Trailer Tire Sizing


8 - 9 - 10 - 12 - Inch Trailer Tire Sizing

Older SizeTire SizeRim WidthLoad RangeOverall Diameter
-4.80/4.00-83-3/4 inch

B: 590 lbs at 60 psi

C: 760 lbs at 90 psi

16.1 inches
-5.70-83-3/4 inch

B: 715 lbs at 50 psi

C: 910 lbs at 75 psi

D: 1,075 lbs at 100 psi

18.1 inches
16.5 x 6.5 - 8165/65-85-3/8 inchC: 800 lbs at 70 psi16.5 inches
18.5 x 8.5 - 8215/60-87 inch

C: 935 lbs at 50 psi

D: 1,165 lbs at 70 psi

18.3 inches
-6.90/6.00-94-1/2 inch

C: 1298 lbs at 60 psi

21.1 inches
-205/50-106 inch

B: 665 lbs at 30 psi

18.3 inches
20.5 x 8 - 10205/65-106 inch

B: 910 lbs at 35 psi

C: 1,100 lbs at 50 psi

D: 1,330 lbs at 70 psi

E: 1,650 lbs at 90 psi

20.5 inches
-4.80-124 inch

B: 785 lbs at 60 psi

C: 990 lbs at 90 psi

20.5 inches
-5.30-124 inch

B: 840 lbs at 55 psi

C: 1,045 lbs at 80 psi

D: 1,250 lbs at 105 psi

21.9 inches
-145/80-124 inch

D: 1,220 lbs at 65 psi

E: 1,520 lbs at 80 psi

21.3 inches




13 - 14 - 15 - 16 - 17.5 Inch Trailer Tire Sizing

Letter SizeMetric SizeRim Width RangeLoad RangeOverall Diameter

A78-13

B78-13

175/80-134-1/2, 5, 5-1/2

B: 1,100 lbs at 35 psi

C: 1,360 lbs at 50 psi

D: 1,610 lbs at 65 psi

24.1 inches

C78-13

D78-13

185/80-134-1/2, 5, 5-1/2

C: 1,480 lbs at 50 psi

D: 1,725 lbs at 65 psi

24.4 inches

F78-14

G78-14

205/75-145, 5-1/2, 6, 6-1/2

B: 1,430 lbs at 35 psi

C: 1,760 lbs at 50 psi

D: 2,100 lbs at 65 psi

26.3 inches

H78-14

J78-14

215/75-145-1/2, 6, 6-1/2, 7 C: 1,870 lbs at 50 psi26.7 inches
-8-14.5MH6 inch

E: 2,540 lbs at 85 psi

G: 3,070 lbs at 116 psi

27.7 inches

F78-15

G78-15

205/75-155, 5-1/2, 6, 6-1/2

B: 1,480 lbs at 35 psi

C: 1,820 lbs at 50 psi

D: 2,150 lbs at 65 psi

27.1 inches

H78-15

J78-15

225/75-155, 6, 6-1/2, 7

C: 2,150 lbs at 50 psi

D: 2,540 lbs at 65 psi

E: 2,961 lbs at 90 psi

28.4 inches
-7.00-15LT5, 5-1/2, 6

E: 2,403 lbs at 70 psi

29.4 inches
-235/80-166, 6-1/2, 7, 7-1/2

D: 3,000 lbs at 65 psi

E: 3,500 lbs at 90 psi

30.9 inches
-235/85-166, 6-1/2, 7, 7-1/2

E: 3,640 lbs at 95 psi

F: 3,960 lbs at 110 psi

31.6 inches
-7.50-16LT6

D: 2,590 lbs at 60 psi

E: 2,926 lbs at 75 psi

F: 3,168 lbs at 85 psi

31.8 inches
-215/75-17.56-3/4 inch

H (single): 4,805 lbs at 123 psi

H (dual): 4,540 lbs at 123 psi

30.2 inches




Questions and Comments about this Article

Chris

I have tent trailer with the std 5.3R12 load range C tires on a std 4 bolt pattern rim and want to go to a wider tire or even a little taller, What are my options?

Etrailer Expert
Reply from Jon G.

You could possibly update to a 175/80-13 size tire (see linked selection), but you'll need to be careful to keep 4" of vertical clearance and at least 2" from the trailer frame to the tire sidewall. This new tire size has a section width of 6.6" and an overall diameter of 24".

Bob T.

Hello I’m currently running the Samson Tracker plus XL 12 16.5 12 ply load range F On my Vermeer chipper it weighs 7000 pounds. Would like to get away from flotation Tires (single axle) The LT 235/85/R16 are getting a bit tall for the fender space width is fine. What could I go to to get the Weight capacity and a bit lower than the 235/85/R16 ? Thanks again

Etrailer Expert
Reply from Jon G.

Any of the 235/85R16 size tires will work for your application. Even the smaller load range E tires have enough capacity for a 7K axle. Attached is a link to our selection for you to filter through.

Lonnie B.

Would a 15 inch tire/rim fit in a wheelwell of a 5x10 trailer with 5.30-12 tire/rim? Is there enough room in the wheelwell area to work? Thx

Etrailer Expert
Reply from Jon G.

You would need to figure in the width and diameter of the new tire/wheel and compare that to what kind of room you currently have. You need 4" of height clearance and at least 2" of clearance from your sidewall to the trailer frame.

Troy P.

Looking for some 8.5L-14 6ply Bias trailer tire, any recommendations?

Etrailer Expert
Reply from Jon G.

Is your tire size 8.5-14 or 8-14.5?

Reply from Troy P.

@JonG It’s 8.5-14

Etrailer Expert
Reply from Jon G.

@TroyP From what I'm seeing it looks like your 8.5-14 tire has about a 28.5" overall diameter. The closest thing we have to that size is something like the 215/75R14 Provider # TTWTRTM2157514D . This has a section width of 8.5", an overall diameter of 27", and a load range D which is 2,200 lbs at 65 psi.

Brandon

I just got done welding on a Dexter 5, 200lb axle. To a 8x6 utility trailer built by another farmer. Its a 6 lug what size tire /rim combo would be recommended?

Etrailer Expert
Reply from Jon G.

I'd use something like the Kenda # AM32673 . I'm just double checking that your hubs have the 6 on 5-1/2" bolt pattern, correct? It's very unusual to see that bolt pattern on a 2K axle.

Reply from Brandon

@JonG just clarifying, its 5.2klbs not a 2klbs axle. 2nd the stud spacing is 5.5 Also another note. I only have a 2.5 inches between axle and frame. That normal for This type axle/suspension? The axle rides on top of the suspension. The suspension is rated for 6klbs

Etrailer Expert
Reply from Jon G.

@Brandon In that case the Kenda I mentioned earlier would work just fine. If you only have 2.5" from the axle beam to your trailer frame that is a cause for concern. We recommend having at least 4" to account for any vertical travel you'll encounter on the road. You can either install longer hangers or you can use an Over-Under Conversion Kit like part # K71-385-00 to increase that distance.

Eric S.

I have a 1997 Salem 21' bumper pull travel trailer. I won't have access to it for at least a couple of weeks, but I want to go ahead and order tires so I can get them on and immediately get out. Any idea what the best tires (and tire size) I'd need to order for this trailer?

Etrailer Expert
Reply from Jon G.

Unless you know what size tire you currently have it would just be a complete guessing game on my part and I don't think either of us wants that. If you can figure out what size your tires are I'd be more than happy to help out!

Johnny

I am wondering if my 2018 Salem Cruise lite 263BHXL which has 14 inch tires on it has 5 x 4.5 in. rims. I want to upgrade to 15 inch with higher load rating.

Etrailer Expert
Reply from Jon G.

We recommend having at least 4" of clearance to the fender for suspension travel and 2" of clearance to the trailer frame. You might be able to use larger tires and still maintain this type of clearance but I'd need to know what kind of clearance you currently have first.

Angela B.

Hi ! New camper owner here ... I have a 1971 Forrester trailer that is 12×7'. Single axel. It currently has ST 185/80 D13 tires. Load class C. The rims are 5 bolt pattern I believe they are 14". I would like to get 2 new tires on rims that I am able to add hubcaps to. What do you suggest? Am I able to go a little bigger or should I stick with this size ? What brand ? Please help I don't want to order the wrong thing.

Etrailer Expert
Reply from Jon G.

As long as the tires are rated properly for your trailer then I don't see any reason to go larger. I would go with the White # AM20212 or Black # AM20214 wheel which will fit with the Baby Moon Hubcap # AM90086 . You can either keep your current tires or you can use something a little more heavy duty like the Kenda Karrier # AM10208 which is a load range D.

Chad

My trailer has B78-13 tires. The bore is 2 5/8". I can not find the right bore anywhere. Any ideas?

Etrailer Expert
Reply from Jon G.

If you're needing a bore of at least 2-5/8" then something like the Dexstar # AM20242 will work just fine if you have a 4 on 4" bolt pattern.

Marioz

Looking at your 'axle-less' wheel mounts. I wish to build an off-road flatbed trailer for pulling with an Arctic Cat Trail UTV. Something in a 1200# capacity, and for 50" trails. I would use leftover 25x8x12, or 25x10x12 UTV tires and wheels. The wheels have a -5"/+3 offset, and are 7" and 8" wide front and rear with 4x115mm bolt pattern. Do you have axle-less mounts for such wheels", and is the 1200# rating given a 600# per mount rating?

Etrailer Expert
Reply from Jon G.

We don't have any hubs that will work with that bolt pattern but if you're able to find hubs that use that bolt pattern and use the L68149 inner and L44649 outer bearings (as well as a grease seal with a 1.179" inner diameter) then you could definitely use one of the axle-less Timbren options like # ASR1200S03 . I guess you can think of it as each one being rated for 600 lbs but they are designed to be used together for a set capacity of 1,200 lbs.

Reply from Marioz

@JonG Thanks for the comeback, Jon. I can get spacers for adapting 4x4, & 4x4.5 hubs to 4x115mm wheels as well. In which case I could still use your axles. I want the wheels to be beneath the flatbed as opposed to outside with fenders, so I would need to know the maximum total length of travel from rest to complete compression for said axle, in order to mount the axles low enough so as not to bottom out on the underside of the trailer. The 5" offset of the wheel would need to clear the distance from the hub face inward to the axle-less mount. (6")

Etrailer Expert
Reply from Jon G.

@MarioZ If you check out the product page for the Timbrens you can see a lot of dimensions that I believe you will find helpful for your application. The resting distance from the center of the spindle to the trailer frame is 2-5/8" and then the suspension has a deflection of 2-1/8".

13 S.

I’m looking to buy a 1973 lark 13ft camper but I gotta replace the tires and having a really hard time figuring out which tires fit it... anybody point me in the right direction? Would be much appreciated!

Tim G.

I have a 2007 Jayco Jayflight 27.5 RKS 30 ft 5th wheel. I blew a tire and took it to Goodyear to get it replaced. I did not notice at first, but they gave me a ST205/75R15 D rated tire max pressure 65 PSI instead of the ST205/74R15 that says max pressure is 50 PSI tire called out on the tire and sticker. I went back, and they told me that I could run the D rated tire at 15 PSI lower to 50 PSI. Plus i now have different tires on the RV, I have seen the sideloads when turning my RV, and I do not feel that this is correct. I feel max pressure is always required on a RV.

Etrailer Expert
Reply from Jon G.

The hard and fast rule used to be that you needed to fill the tires up to the psi rating on the sidewalls but in the recent past that has changed as trailer tire manufacturers started doing more testing of the tires at different psi ratings. It is always best to be using the same tire on every axle of your 5th wheel and to have them all at the same psi rating (being sure that it's sufficient for the weight of your 5th wheel).

Reply from Tim G.

I talked to Jayco today, and they said the tires need to match the sticker. In some states I could get pulled over and receive a ticket for not having matching tires to the sticker. They also recommended not to change the rating on the tires. My guess it has to do with weight handling, as in someone may overload the RV by looking at the rating of the tires.

Etrailer Expert
Reply from Jon G.

@TimG Yeah this is something that trailer and tire manufacturers have agreed to disagree on for a while now.

Lee

Would like to know if all the 480x12 tire rims have the same 5 hole pattern as larger 12’s a 5.30x12 to go to a larger tire and rim.

Etrailer Expert
Reply from Jon G.

Yes, the 5 on 4-1/2" bolt pattern will be the same for the 4.80-12 and 5.30-12 wheels/tires.

Donald A.

I see you said the following to somebody and my question will be at the end. Etrailer Expert Reply from Kef G. 3/23/2021 I can't say I've heard of this problem with the Castle Rock tires. We do have plenty of 185/80-13 tires here that I've linked to below. I wouldn't recommend going a size up since there may be problems with clearance. As for the comparison between ST and LT tires, I recommend sticking with ST on a trailer since they are built stronger to handle the heavier loads. All right I have a 5-ft by 12-ft trailer that I bought a used and I have no clue what the original tires were on it. Somebody put some car tires on it and I'm guessing from a junkyard. Is there a way you can tell me what the original tire size would be on it? All I know for certain is the bolt pattern is four and a half inches across. My reason for this question is simple, I once had a pallet of landscape pavers put on in the trailer and the fender set on the tires. Now last Saturday I had a blowout with one scoop of sand. I'm trying to figure out what to do. As for car tires not being able to handle the weight, then how do they handle the weight of an engine or the body of a car or anything else? It just doesn't make any sense to me.

Etrailer Expert
Reply from Jon G.

Great question! So passenger car tires have more flex in the sidewall which allows them to handle vehicle maneuvers in a more comfortable fashion. Since trailers are designed for hauling their tires have a stiffer sidewall that helps hold the load and is able to withstand the movement of the suspension better. We recommend having at least 4" of clearance to the fender for suspension travel and 2" of clearance to the trailer frame. If you can tell me what your current tire size is and what the weight capacity is for your trailer I can see if we have something that would work. Aside from that I don't really have a way to know what initially came on your trailer.

Tim

I'm looking for smaller tires/wheel combinations for a flatbed trailer that can carry great weight to build a tiny house - 2 or 3 axle - preferred tire size would be 16" or less and the 3 axles with 6 or twelve wheels would need to carry approx. 30,000 lbs Thoughts?

Etrailer Expert
Reply from Kef G.

That sounds like quite an undertaking! You'll want to make sure your axles have the capacity to handle the weight you're planning to load. As for the size of tire and wheel, you'll need to find ones that match not only the weight capacity requirement you'll have, but also the bolt pattern of your hubs. You might be able to find something like that under 16", but really the above requirements will need to be the first priority.

Mike C.

I have ST 185/80/13 tires on my 12 ft epro 12rk . They are the castle rock tires everyone complains about being the infamous " china bomb " tires , known for blowing out ! I thought I'd just find some American made ST tires and 1 size up to would be great ( not sure what size that would be ) ? Then while searching on youtube I start seeing videos of certified airstream mechanics and others saying that most all ST tires end up getting to hot and failing and to use LT tires or car tires cause they'll last longer. So now I'm confused ! I've dragged a utility trailer for near 30 years for work , so I'm not a novice pulling trailers , it's just with this trailer bomb image in my mind , I thought I'd try to get some clarification ! Thanks in advance for your time, experience and advice !

Etrailer Expert
Reply from Kef G.

I can't say I've heard of this problem with the Castle Rock tires. We do have plenty of 185/80-13 tires here that I've linked to below. I wouldn't recommend going a size up since there may be problems with clearance. As for the comparison between ST and LT tires, I recommend sticking with ST on a trailer since they are built stronger to handle the heavier loads.

Reply from James C.

@MikeC The issue isn't between being an ST tire or an LT/Passenger car tire. It is the tire construction, either Bias ply or Radial. Bias ply tires are stiffer and can handle more weight, but that also means more friction, thus more heat build up. Radials on the other hand have more flexibility. So they build less heat, but being less stiff means less weight capacity and more trailer sway. ST tires come in both bias ply and radial. LT/Passenger tires mostly only come in radial. Bias ply or radial? Depends on the conditions the tire will be put in. For many people radials are the best option, especially for those who mostly tow on the highway. That is where heat build up is most likely. When looking at tires, metric sizes only, the size even has a identifier indicating bias ply or radial. ST185/80D13 would indicate the tire is bias ply. Where ST185/80R13 would indicate radial. The D indicates bias ply and the R indicates radial. For other tires you would have to look at the description to find out if it is bias ply and radial.

Philip A.

Hello I'm new to have a boat I have a 1991 Smoker craft trailer I'm trying to find info on the tire size u need so I can replace the old ones the previous own had on the trailer

Etrailer Expert
Reply from Jon G.

To replace the tires you will want to check out the sidewall of your current tires. The size will be listed on there and should look similar to the numbers in the "tire size" column. You can see a good, clear picture of the tire size on the sidewall in the attached article.

Paul B.

Is a 13” diameter tire available in 8 ply and 2000lb load capacity

Etrailer Expert
Reply from Jon G.

Unfortunately not. So reach a 2,000 lb weight rating you're going to need to use a 205/75-14 tire with a load rating of D (2,100 lbs).

Joe

I have 155/80/13 on my boat trailer and would like to stay that size or a little smaller but am really needing to go to a heavier load capacity. What should I do?

Etrailer Expert
Reply from Jon G.

It sounds like you're currently using passenger car tires for your boat trailer. The closest size we have to that with trailer tires is the size 175/80-13 but this is about 1-1/4" larger in diameter so you're going to add about 5/8" of height to your tires. Here is a link to our selection for you to check out.

Reply from Joe

@JonG if I wanted to go a little smaller than the 155 80 13 what would I have to go down to? I'm not against charging wheels

Etrailer Expert
Reply from Jon G.

@Joe The next size smaller that would work is 145/80-12. Here is a link to our selection that has the different load ratings, tire/wheel combos, and bolt patterns that you can filter through. If you can let me know what bolt pattern you currently have and how much the axle on your trailer is rated for I'd be more than happy to make a recommendation for you!

Norman

I need a trailer wheel to.fit a 4.80_3 tire no lug nut on wheels

Etrailer Expert
Reply from Jon G.

Did you mean 4.80-8? We have some 8" wheels (see linked) but they all use lug nuts to install on the trailer hub. Do you have a small farm/mower trailer?

Mike

i have a 97 jayco camper what are the stock rims width 5.5?

Etrailer Expert
Reply from Jon G.

Unfortunately I don't have a database to look that up in. Jayco might be able to give you that info if you have the VIN for your trailer.

Kyle B.

My trailer has 225/75/r15. My spare is a 235/75r15 am I able to use this spare or will it cause problems on the road

Etrailer Expert
Reply from Jon G.

Difference in tire sizes will cause problems. Even load range differences can have uneven wear on the tires. The best practice is to have the exact same tire for all of your tires. Technically you can use the slightly larger size but I'd only do that if you only need to travel a few miles to a trailer or tire repair shop.

Wallace P.

My boat trailer tire size is 185-75-14 is this size still being manufactored ?

Etrailer Expert
Reply from Jon G.

Sounds like you have vehicle tires on your boat trailer. You should be able to use the trailer tire size 205/75-14 instead. This new tire size will be about 1/2" taller and almost 1" wider so we will want to make sure that we still have a 2" clearance gap between our tire sidewall and the trailer frame as well as 4" of clearance from the tire tread to our wheel well.

Marvin M.

Hi I got 205/75/r15 tires on my trailer 5x8’ I’m trying to get smaller wheel/tires so my trailer can fit in my garage because of my HOA. What size can get? The trailer is 3” taller than my garage.

Etrailer Expert
Reply from Jon G.

What is the weight rating for the axle on your trailer? You could go with something in the 12" wheel range but then we are talking about a noticeable difference in weight capacity for those tires plus we have to make sure the bolt pattern matches.

Reply from Marvin M.

@JonG axle is 2990lbs It says shouldn’t exceed 1970lbs. I use this mostly for traveling and doesn’t exceed 500lbs of weight total. It has 5lugs

Reply from Marvin M.

@JonG Hi the axle is gawr 2990 each with 5 lugs. Looking for 900-1000 lbs max of load. I don’t haul much.

Etrailer Expert
Reply from Jon G.

@MarvinM Thank you for the information! Your current tire has about a 28-1/2" diameter so to reduce the height of your trailer by 3" we need a tire that is 6" smaller in diameter (since that will be a 3" difference at the top and at the bottom). Attached is a link to our selection of tire/wheel combos that should work great for your application as they have a load rating D (1,220 lbs at 65 psi) and a 5 on 4-1/2" bolt pattern. Just make sure you don't exceed your trailer weighing 1,970 lbs and you should be just fine.

Joseph L.

I have a 3100 pound boat and trailer what size tire is recommended i have 16 on it now and my pontoon won't float off trailer

Etrailer Expert
Reply from Jon G.

What is your current tire size (the entire number on the sidewall) and what is your bolt pattern? We recommend making sure that you have at least 4" of clearance to the top of your wheel well and then at least 2" of clearance to your trailer frame.

Rosalee

Tired on utility trailer are 215-70 R15, can I use a 235-75-R15 for a spare tire? Thanks

Etrailer Expert
Reply from Jon G.

Potentially. It's best to make sure that you have 4" of tire to fender clearance and then at least 2" of clearance from your tire sidewall to your trailer frame. A 235/70R15 size tire has an overall diameter of 28.9" and a section width of 9.3" so you'll want to compare that to the space that you have available.

Bruce

I'm looking to buy a 16 by 8 cargo trailer we'd like to raise it for off road camping what is the best way to raise 4 clearance bigger Wheels, reverse axle mounts or both

Etrailer Expert
Reply from Jon G.

Using an over-under conversion kit like part # K71-384-00 or # K71-385-00 would be the most cost-effective option and would raise your trailer the height of your axle plus the height of your leaf spring stack. Larger tires could help but you would have to go with much larger tires to see any significant change in height. With either of the options above though you will still have the axle so far above the ground. To get the most overall clearance you'll want to switch to a Timbren Axle-Less System (see attached). Since these don't use a crossmember you essentially have the whole underside of your trailer clear.

Bobby S.

I'm building a 34 ft trailer I'm going to buy 3 4k-7k axles to put on it. How do I determine what size tires to put on it?

Etrailer Expert
Reply from Jon G.

For a trailer build I would first look at the weight ratings for tires. Weight ratings are for each individual tire so for a 7K axle you would want a tire that has a weight rating of at least 3,500 lbs so that you can be confident your tires aren't the least rated component. Once you've got the weight rating in mind you can then look at the overall diameter and the width of the tires to make sure that they will have 4" of height clearance to any kind of fender (to account for suspension travel) and then at least 2" of clearance to your trailer frame.

Mary D.

Question: I just inherited a 1993 Lance 5th wheel trailer and need to replace the tires do you know what size I will need?

Etrailer Expert
Reply from Jon G.

We do not. You might be able to find that in the owner's manual or you can look at the tire size on the current tires. It will be located on the sidewall and will look similar to this - 225/75-15.

Willie

I need new tires for a small 15 ft 1994 Eddy trailer. Please advise as To what is required and best places to purchase. And thank you!

Etrailer Expert
Reply from Jon G.

What size tire will you be replacing? We recommend trying to stick with the same size so that you don't run into any clearance issues. We sell both tires and wheels here at etrailer so I'm kind of biased but if we have the size you're needing then I would say that we are the best place to purchase from!

Greg

I have A 8400 lb 35’ travel trailer. It has trailer king 225 75ST is that A good replacement

Etrailer Expert
Reply from Jon G.

Trailer King tires are more of a middle-of-the-road type of tire when it comes to quality. They will get the job done but I wouldn't say they are anything special. If you're looking for something better, then I recommend the Goodyear Endurance # 724857519 which is also available on a white wheel with a 6 on 5-1/2" bolt pattern as part # 724857519 A.

Diego S.

Hi I own a 3x4 trailer with 4.80-8 tires, and i need new tires is it ok/safe for me to upsize them to 12 inch tires?

Etrailer Expert
Reply from Jon G.

As long as you have enough clearance for them you can upgrade to a larger tire size. We recommend having at least 2" of space from your tire sidewall to the trailer frame and then at least 4" between the tire tread and a fender to account for suspension travel.

David S.

I have a 5000 lbs travel trailer that has ST225/75 15D tires. The chart says this tire this tire is rated at 2540 lbs @ 65 PSI. This trailer has tandem axles so would the load capacity be 2540 X 4 =10160 lbs or 2540 X 2 = 5080 lbs

Etrailer Expert
Reply from Jon G.

The tires add to each other so for your 4 tires the load capacity will be 10,160 lbs. Please note that you are limited by your least rated component so if your axles and/or trailer frame is rated for less then that, you'll want to stick with the lowest rating.

Sara

I have a 04 Dali bumper pull Steel stock Horse trailer I bought used. It came with 225 75R15 on it but now need replacement. Is this a good tire to continue to use on a horse trailer that I use weekly for shows up to 2hrs hauling 2, 1000pound horses. Thank you in advance.

Etrailer Expert
Reply from Jon G.

It kind of depends on how much the trailer and horses weigh together, but something like the Goodyear Endurance # 724857519A rated for 2,830 lbs at 80 psi should be able to. Just remember that the weight rating is increased for each tire used so for a 1 axle trailer using this tire they could handle up to 5,660 lbs combined.

Reply from Sara

@JonG this is a double axle trailer

Etrailer Expert
Reply from Jon G.

@Sara In that case you're looking at 11,320 lbs for 4 of them combined. Just be sure that you don't exceed the lowest rated component in your setup, whether it's your axles, tires, or trailer frame (GVWR) and you'll be just fine.

Austin

I have trailer tires that have 7-14.5 on the sidewall. I am looking to get a spare for the trailer. What size range of tires should work as a spare?

Etrailer Expert
Reply from Jon G.

You definitely want to go with a 7-14.5 size tire because any other size will cause your tires to show inconsistent wear and could cause other problems like to your suspension. We don't have any 7-14.5 tires (and they aren't as common anymore) so if you can't find this tire the safest thing to do is to swap out all of your tires so they all match.

Reply from Beverleigh R.

@JonG I am currently dealing with the same exact problem and tire size. Do you have any recommendations on a rim and tire that would be safe and compatible with a 7-14.5 mobile home tire?

Etrailer Expert
Reply from Jon G.

@BeverleighR While we don't have any 7-14.5 size tires we do have some 14.5" rims. Part # AM20308 is 6" wide and has a 6 on 5-1/2" bolt pattern while part # AM20320 is 7" wide and has an 8 on 6-1/2" bolt pattern. You'll basically want to get the right bolt pattern and then check out the specs on that product page to make sure that it matches your application.

Jon

I have a 1973 Holiday Rambler trailer. Looks like original tires! They have 8.55-15S on the side wall. What replacement do you recommend? Thank you.

Etrailer Expert
Reply from Jon G.

For your application you need a 225/75-15 size tire. I recommend using the Contender # C22515E as it's one of the best tires we have in this size.

Charlie

I have trailer tires need replacing they are FIRESTONE Deluxe Champion G78-14ST. Can you tell me the equivalent to that tire size in a radial . Thanks

Etrailer Expert
Reply from Jon G.

The tire size you're looking for is 205/75-14. I highly recommend the Goodyear Endurance # 724864519 because it is one of the best performing tires that we have to offer. Just be sure that the weight rating of 2,040 lbs at 65 psi works out for your application!

Reply from Charlie

@JonG Thx so much for your reply .

Solomon

We have lowbeds. The tires fitted on the tractor are 12*24 and the tires on the trailer are 12*20. Will it make any problem on the tractor, trailer or on the load if it couple these two?

Etrailer Expert
Reply from Jon G.

I believe what you're asking is if the tires on your tractor and the trailer have to be the same? The answer to that would be no. Just make sure that you aren't overloading your tractor or trailer, and that you're able to tow your trailer with it being level and you're good to go!

Brad

1969 Barth trailer 22ft long double axle had 4, 7.0x15 tires (28.3”tall). I have some 18” truck wheels that will fit. What size tire is best? 225/60/18 LT tire & (28.6” tall)

Etrailer Expert
Reply from Jon G.

You definitely want to go with tires that have similar dimensions. Your 7.00-15 should actually have a 7.7" section width and an outer diameter of 29.3" like what we have with the Kenda tire # AM10412 or # AM10414 . We don't recommend using truck tires for trailers because they have a different construction. The tires I mentioned above are labeled as "light truck" but since the LT is at the end of the size it means that they were designed for trailers.

Reply from Jon

@JonG I now have 18” wheels. So I should get 225 65 18 to match the 29.3 height? This trailer will only be used for fun locally on our property. Rarely driven at most 1-2 hours away a few times a year.

Etrailer Expert
Reply from Jon G.

We just say to make sure you have at least 4" of clearance between the top of the tire and your fender to account for suspension travel and then at least 2" from the trailer frame to the sidewall of your tire. Trying to match you current tire dimensions is a good way to go if you know that your current tires have the proper amount of clearances.

Nancy

Hi I have a 1969 Scotsman 12ft Travel trailer and need to know what size tires I need for it, can you help me?

Etrailer Expert
Reply from Jon G.

I wish that we had a list of exact replacement parts for trailers but unfortunately we don't. Do you know what tires were recently on it?

Mari J.

Hello, I have a 1958 siesta trailer that needs tires and I don't know what size to get. The tires that are on it is very old and the numbers appear to be 7:35-15 Can you help?

Etrailer Expert
Reply from Jon G.

The correct replacement for your 7.35-15 size tire is a 205/70-15. The closest we have to this is 205/75-15 which will have the same width but a little less than 1" larger diameter. Here is a link to our selection of these tires as well as the various tire/wheel combos in this size.

Nick

Hi I have a trailer wheel 5.5 stud with a tyre size of 5.20 - 13. What normal size tyre can I put on the rim

Etrailer Expert
Reply from Jon G.

It looks like your 5.20-13 tire has an overall diameter of 23.10 inches and a section width of 6 inches. The closest thing that we have is a 175/80-13 size tire which will have an overall diameter of 24.10 inches and a section width of 7 inches. As long as this allows you to have about 4 inches of clearance from the top of the tire to your fender, and at least 2 inches of clearance from the sidewall of the tire to your trailer frame you will be good to go. Attached is a link to our selection of tires (and some wheels) in this size. None of the wheels have a 5 on 5 inch bolt pattern so you'll have to supply that part on your end.

John

I have a 5 x 10 homemade trailer w H 78 15 tires on it will a 8 ply st 225 75 15 work ?

Etrailer Expert
Reply from Jon G.

Yes, 225/75-15 is the size tire you're wanting. Just make sure that your tire weight rating is at least as much as your axle and you're good to go!

Reply from John

Thank you Yes I believe the load range is D

Mel K.

Hello, I'm trying to figure out what tires and wheels I need for a odd trailer that has a sun room type building on it ( mostly glass) it's sitting behind a house I purchased and I want to move it. I have the axles and springs in place and need to purchase the spring bolts somewhere and decide what tires to use, its a double axle with 30" between spring bolts, the bolt pattern on the hub is 4.25 from lug to lug. There;s about 8.5" distance from the spring bolt to the bottom of the trailer frame.

Etrailer Expert
Reply from Jon G.

What is the distance from the center of your hub to the trailer frame? It sounds like you have a 5 on 4-1/2" bolt pattern. You can confirm this with the attached article. Typically the bolts used to attach the leaf spring to the hangers has a 9/16" diameter so a wet bolt like part # 126B2 can be used. You'll need to confirm this on your end though.

Reply from Mel K.

@JonG sorry just got back in town, this frame has a unique structure on it (is it possible to send a picture?) Not sure on the wheel diameter and tire size, yes it is 5 lug, .

Reply from Mel K.

@MelK I measured the 5 lugs again and sure looks like 4.25 from lug to lug. The distance from hub to bottom of trailer frame is 16" but the building on the frame drops down 3" and it looks like the tires will hit, so from the center hub to the structure its 13" From face of the hub out there is 3.5" clearance and from face of hub to the frame there is 5.5" clearance. Do all the 9/16 bolts come with a grease fitting?

Etrailer Expert
Reply from Jon G.

@MelK If it really is 4.25" then I'm afraid we won't have any rims that are compatible. As far as tires go I think your best bet is the Taskmaster 4.80R12 Radial Trailer Tire - Load Range C (990 lbs at 90 psi) # TT48012C , but you'll want to make sure that 990 lbs (per tire) is enough capacity for your trailer. You basically just want to make sure that your combined tire rating is at least as much as your axles. It varies if the wet bolt actually comes with the grease (zerk) fitting. Here is a link to our selection of 9/16" bolts that you can filter through.

Quade

I have a 1991 Excel 5th wheel 29 foot. But someone put vehicle tires on it. I need to figure out what size tires it supposed to have

Etrailer Expert
Reply from Jon G.

Look for a sticker either on the frame, in a compartment, or elsewhere on the RV. Sometimes there will be a sticker that shows what size tires the RV should have. If the tires right now don't have a clearance issue you can let me know what size they are and I can tell you what the equivalent would be for trailer tires.

Bill

I currently run 225 75R15 tires I want a little taller tire to improve ground clearance .... I’m looking at new axles but thought I’d try the tire route first if possible

Etrailer Expert
Reply from Jon G.

You'll get a little bit of ground clearance with larger tires but you really won't see that much of a difference. Your 225/75R15 tires have a diameter of 28.4" and even if you installed 235/85-16 tires which have a larger diameter of 31.6" you're really only gaining half of that in height. So you're looking at an increase of about 1.5". You'll see the most increase by using an over-under kit like part # K71-385-00 or by installing taller hangers.

Ray

Can I put 13 inch tires on my 8 ft trailer instead of the 12 inch going to FLA pulling my golf cart

Etrailer Expert
Reply from Jon G.

As long as you can have 4" of clearance between your tire and the fender as well as 2" of clearance between your tire and the trailer frame you can definitely upgrade the tire size. Here is a link that I think you'll find helpful.

Jt

I bought a utility trailer with ST205/75/15 tires. I am an inch to tall to back the trailer into my garage (with a UTV on it) and was wondering if its possible to put on smaller tires (maybe a size 13) to save a few inches? This assumes the load rating supports it.

Etrailer Expert
Reply from Jon G.

Yeah it's definitely possible as long as the load rating supports it like you said. I'd go with a 185/80-13 like the Kenda Karrier # AM10208 which is rated for 1,710 lbs at 65 psi.

Robert M.

Can I change my 14inch to 15 inch rims and tires on a star craft ar one 17 rd year 2016. I want a load range e tire. Thanks

Etrailer Expert
Reply from Jon G.

As long as you can retain about 4" of height clearance between the tire and fender and then at least 2" of clearance from the sidewall to your trailer frame you are good to go.

Shane N.

Trying to determine the right size tires for a 2013 Gulf Stream Conquest 323 TBR that I just bought.

Etrailer Expert
Reply from Jon G.

I wasn't able to find anything either. I'd try reaching out to Gulf Stream Coach with your VIN as they should be able to tell you what came on your trailer.

Chris

What rim size is recommended for a 16’ tandem axle utility trailer.

Etrailer Expert
Reply from Chris R.

This is really dependent on the actual loaded weight of the trailer, along with what kind of clearance you actually have available below the fenders. Do you know what size is currently used on the trailer?

Gary H.

Have a boat trailer withe 2 tires size 185/70R13, must be a discontinue size, what is the closest size tire they may be a little smaller but not bigger because of fender, needing a spare.

Etrailer Expert
Reply from Chris R.

The closest alternative to that size we have available is an ST185/80-13 like the Kenda # AM10208 . This will be just a tad larger than what you currently have, but only by 1/2". That means the new tire will creep closer to the fender by just 1/4".

Reply from Gary H.

@ChrisR Found a plate on boat trailer that calls for P175/80B13, should I change both tires to that size and just keep old tires for spares.

Etrailer Expert
Reply from Jon G.

As long as the 175/80-13 tires have enough weight capacity to handle the trailer then go for it (see attached link). I only recommend using a different sized spare to hobble along a mile or so to your next exit. It would be best to have all of your tires the same size that way if you have to swap one out you can continue on your travel until you can find a tire shop.

Joey

I need new wheels(rims/tire) for a homemade trailer. The tire size is 205/75R15 The hub is a 5 lug 4-1/2 but the center hub hole is only 2-1/2 inches across, Do you have any wheels that will fit this. I do not see a way to filter by hub/pilot size. All the ones I see are 3.19 inches or larger.

Etrailer Expert
Reply from Chris R.

All of our wheels are lug-centric (which is almost always the case with trailer wheels), which means they center and secure to the hub using the lugs - not the hub itself. That's a long-ish way of saying the pilot hole diameter doesn't matter. I've linked our full selection of radial ply 205/75R15 tire/wheel combos below.

Jimmy

I just bought a 1998 sportsman camper trailer 26 ft and wieght 4500 with dual axal its a bumperpull it has 4 diffrent size tires on it i would like to know what it the actuall manufacturer size to go on it i cant find anything on google searchs untill i found this site hopefully. Yall can help thanks

Etrailer Expert
Reply from Chris R.

Unfortunately there's no way for me to verify what the factory/stock tire size was for your 1998 Sportsman trailer, though you will definitely want to change out the tires so that they are the same ASAP. I might just match to the largest tire size you currently have mounted to ensure sufficient weight capacity.

Udo M.

I have a trailer with 5 on 4 1/2" and 12" Mickie mouse wheels. I need to go larger not for the load 1 (Motorcycle ) but for the tow vehicular. I like to go with 14-15 " wheels. To see what will fit, I need the backspacing (offset) for the 14"x 6" wheel and 15"x 6"

Etrailer Expert
Reply from Chris R.

Are you looking at a particular model wheel? Most of the wheels we have available have a zero offset, which is pretty standard for trailers.

Reply from Udo M.

@ChrisR 0 offset means there have the bolting surface in the center. If this is the case I can figure out what I need. Need to take some measurements.

Danny

I have just bought a 2017 RAM 3500 to replace my 2013 F150 EcoBoost to pull my fifth Wheel and I may have to raise the trailer up a few inches. I was thinking about getting the taller tires first But I cant find a suitable tire to replace the ST225/75/R15's. Any suggestions besides investing in 16 inch rims? I only have 4" clearance for upward travel in the wheel wells and 4.5" between tires. The axle is already under the leaf springs! I appreciate your help, Danny

Etrailer Expert
Reply from Chris R.

Taller tires will increase the trailer height a bit, but the problem is that you'd have to get significantly larger tires to really make a difference - and it doesn't sound like you really have the fender clearance to make that possible. To raise the trailer 3" just from new tires would require tires that are 6" larger in diameter/height than what you currently have (since half of the tire sits above the axle). My best recommendation for raising the trailer would be to simply cut off your current hangers and replace them with longer ones. I've linked our full selection below.

Steve S.

my current pop up has a 20.5x8-10 tires which I believe is a 5 x 4.5 bolt pattern. I have heard radials are much better and a smoother ride. Is it possible to upgrade to radials and what sizes would I be looking for?

Etrailer Expert
Reply from Chris R.

A radial ply tire is definitely a better option, especially when it comes to highway travel. In your existing tire size we only have bias units available, but if you upgrade a bit you could go with a 145/80R12 like the Kenda # AM31202 . This tire/wheel will be about an inch larger in diameter/height but around 2.7" smaller in width. It features a maximum load of 1,220 lbs at 65 psi.

George C.

currently have goodyear 195/75r14 on utility trailer what is an inexpensive replacement?

Etrailer Expert
Reply from Chris R.

The closest trailer tire size we have available to that is a 205/75R14, which will be a little under an inch larger in diameter/height than your existing tires. The Contender # C20514C is an excellent, economical option. It features a max load of 1,760 lbs at 50 psi and an 81 mph speed rating.

Jeff B.

I have a trailer that was built on an axle (home made) and the tires are 245/50 R16. Could you recommend a trailer tire size that would work?

Etrailer Expert
Reply from Chris R.

The smallest 16" trailer tire size we have is a 235/80R16 like the Prodivder # TTWTRTM2358016E . This tire will have an overall diameter/height of around 30.7" and a width of 9.25".

Hunter L.

My camper has 7.00-15LT tires and I'm having trouble finding a replacement size, it needs to be really close to the same size so I dont have to flip the axles under the springs to make sure it doesnt sit too low, thank you for the help in advance.

Etrailer Expert
Reply from Chris R.

We have that exact size available. I highly recommend the Kenda # AM10414 , which features a maximum load of 2,403 lbs at 70 psi.

Tony S.

My old trailer PRYOR 1988 has st205/75d14 needs tires replacement, can you advice a good and cheap replacement tires.

Etrailer Expert
Reply from Chris R.

The Contender # C20514C is a high-quality, cost-efficient unit that will work perfectly as a replacement on your PRYOR trailer. It features a maximum load of 1,760 lbs at 50 psi and an excellent 81 mph speed rating.

Raven D.

Just acquired an old EZ Haul trailer. Numbers on the tires are 8 15 15. No letters. I did not find this on the chart. Does anyone know what size tires I should be looking for?

Etrailer Expert
Reply from Chris R.

I've not heard of that tire size listing before. Are there by chance any other numbers printed anywhere else on the tire's side wall?

Mike B.

Will a 14" tire and rim fit under my fenders on a Kar Kaddy? I currently have 13".

Etrailer Expert
Reply from Chris R.

It depends on how much fender clearance you currently have available with the 13" tires. The Kar Kaddy dollies we have in stock actually come with 14" units attached, so I'm thinking you'd be okay but I definitely recommend checking to be sure. We recommend maintaining at least around 4-1/2" of space between the top of the tire and fender. The smallest size 14" tire/wheel we have available, a 205/75-14 like the Kenda # AM32156 , has an overall diameter/height of 26.3".

Taryn R.

I have a trailer with tires sized 175/70/14 84T but I think I need something that is higher loadbearing, what size will fit the wheel?

Etrailer Expert
Reply from Chris R.

A 175/70-14 tire size isn't too common on a trailer. A close alternative that will fit your existing rims and hopefully offer a higher load capacity (I'm not sure what your existing tires are rated for) is a 205/75R14 like the Kenda Karrier # AM10235 , which features a 2,200 pound limit at 75 psi. This will be just over 2" larger in diameter than your current tires.

Tammy

What is a different size tire that could be used to replace an a 8 x 14.5 ply 14 tire for a mobile home trailer?

Etrailer Expert
Reply from Chris R.

The only tire we have available that will fit your existing 14.5" wheel is the same 8-14.5 unit like the Kenda K39 # AM10321 . Any other size would require you to change wheels as well. If you're okay with this, an ST205/75R15 size like the Provider # A15R6WSD would be really close to what you have. This would be smaller in diameter/height by just over a half inch and the width is essentially the same.

Tresa S.

What is 2 sizes up from 4.80-8

Etrailer Expert
Reply from Chris R.

We only have one 8" tire size larger than your existing 4.80-8 unit, and that is with a 5.70-8 like the Kenda # AM10013 . This tire size features an overall diameter/height of 18" (compared to 16.1" on your existing tire) and a width of 5.8" (compared to 4.6"). Anything larger would require a new wheel as well.

Phillip

Old 10.00 x15 lowboy tire what is diameter need tire size for 17.5 Dayton wheel

Etrailer Expert
Reply from Chris R.

A 10.00-15 size tire will have an overall diameter of around 36" and a width of 10.8". It's designed to fit 15" x 7.5" wheels so it's not going to work on your 17.5" rim. For this size wheel you will need something like the Provider 215/75R17.5 # TTWP15175 , which has a 30.2" diameter and a width of 8.31".



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