1. Tires and Wheels
  2. Kenda
  3. Tire Only
  4. 12 Inch
  5. 145/80-12
  6. Load Range E
Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E

Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E

Item # AM10140
lowest price pledge
Retail:$87.75
Our Price: $74.81
You Save: 15%
Tires and Wheels
Orders above $99 qualify for Free Shipping
Shipping Weight: 15 lbs
Quantity: 
In Stock, Ships Today
AM10140 - 145/80-12 Kenda Tire Only
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

Radial special trailer tire with automotive-grade tread has a ply rating of 10 and a 1,520-lb max load at 80 psi. Designed for highway use. Constructed of double steel belts and full nylon plies. Fits 12" wheels. Lowest Prices for the best tires and wheels from Kenda. Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E part number AM10140 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (778)
  • Q & A (140)
  • Videos (1)
  • Photos
  • Why etrailer?

Kenda Tires and Wheels - AM10140

  • Tire Only
  • 12 Inch
  • 145/80-12
  • Load Range E
  • Radial Tire
  • Kenda

Radial special trailer tire with automotive-grade tread has a ply rating of 10 and a 1,520-lb max load at 80 psi. Designed for highway use. Constructed of double steel belts and full nylon plies. Fits 12" wheels.


Features:

  • Radial ply tire is great for highway use
  • Constructed with double steel belts and full nylon plies for superior function and long life
    • Premium rubber compound materials help disperse heat
  • Automotive-grade, computer-generated tread has sipes that channel water away from the tire to improve traction during wet, snowy, or icy conditions
  • Special trailer (ST) tire has sturdy sidewalls so that it can handle heavy loads
    • Created specifically for trailers and not intended for use on other vehicles
  • Meets DOT specifications


Specs:

  • Fits: 12" x 4" rims
  • Tire size: ST145/R12
    • Section width: 5.7"
    • Outer diameter (when inflated): 21.3"
  • Capacity:
    • Load range: E
    • Ply rating: 10
    • Maximum load: 1,520 lbs at 80 psi
  • Maximum speed: 65 mph
  • 2-Year limited warranty


Karrier S-Trail Radials with Automotive-Grade Tread

Kenda Karrier S-Trail Tread Vs Standard Tread

Unlike standard trailer tire tread, which has solid, continuous ribs, the automotive-grade, computer-generated tread on these Karrier S-Trail radials has ribs with breaks. These breaks allow water to run off to the sides. The Karrier S-Trail tread also has sipes. Siping is a process in which thin grooves (or sipes) are cut into the rubber of the tire. The grooves channel water away from the tread so that the tire makes better contact with the road. Both of these features greatly improve traction during wet, snowy, or icy conditions.


Karrier S-Trail radials are constructed with double steel belts and full nylon plies for increased durability and endurance. The premium rubber compound materials of this tire help disperse heat.


Radial Tires vs. Bias Tires

Radial tire vs bias tire graphic

Radial ply tires are designed for trailers that are towed on the highway. The cords on a radial tire are positioned at a 90-degree angle to the direction of travel so that they lay across the width of the tire from wheel lip to wheel lip. This construction prevents the cords from rubbing against one another when the tire flexes, unlike the cords on a bias ply tire. As a result, radial tires have less rolling resistance and heat buildup, which leads to a longer tread life and improved steering at higher speeds.



10140 Kenda Karrier KR25 S-Trail ST145/R12 Radial Tire - LR E





Video of Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Kenda Tires and Wheels - Tire Only - AM10140 Review

Today we'll be reviewing part number AM10140. This is the Kenda Karrier S-Trail Radial Trailer Tire with a load range of E. This is a special trailer tire design, so it's going to couple the strength of a bias tire with the durability and stability of a radial tire. It's created specifically for trailers, so it's not going to be intended for use on other vehicles. It had double steel belts and fully nylon plys that combine for superior function and long life. It does feature a computer generated tread design and premium rubber compound materials, so it's going to offer superior traction in wet or dry conditions. This radial tire does meet Department of Transportation requirements. It's going to be designed to fit 12" by 4" rims.

The tire size is going to measure ST145R12, with a section width of 5.7". So that's outer wall to outer wall. When fully inflated, it's going to give us and outer diameter of 21.3". When it comes to capacity, again, this is going to be load range E with a 10 ply rating. It's going to offer a maximum load of 1,520 pounds at 80 PSI, with a maximum speed rating of 65 miles per hour. It has all the indicators here on the outer wall of the tire, that you could always use as quick reference guide, in case you ever need to gain access to that information. That's going to do it for today's review of part number AM10140.

This is the Kenda Karrier S-Trail ST145R12 Radial Trailer Tire. .


Customer Reviews

Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E - AM10140

Average Customer Rating:  4.8 out of 5 stars   (778 Customer Reviews)

Radial special trailer tire with automotive-grade tread has a ply rating of 10 and a 1,520-lb max load at 80 psi. Designed for highway use. Constructed of double steel belts and full nylon plies. Fits 12" wheels.

- AM10140
by:

Got the new tires and had them mounted up. Im glad etrailer had a better small tire for my 5x8 trailer. Ive Had other tire shops tell me 4 or 6ply was the only ply available for the small trailer i had and the farm stores only offered the 4 or 6 ply tire. Etrailer had 10 ply,radial tires for my need that is rated up to 65 mph on the highway and im very happy. Living on a gravel road, and using the small trailer on the farm i would have flat tires all the time with the old weaker 6 ply tires it came with and they wouldnt last very Long if used them on the pavement. 562655


Comments
Still going strong. No flats and tread wear is still doing great also. Id say theres only about 1000 miles on them as i dont use the trailer every day but i did use it on my farm where the other tires wouldnt last long before getting a flat from a cut off tree stump or thorns. I will buy again when needed and have told plenty other people about the tires and where to get them.
James - 09/07/2019

60898

- AM10140
by:

So happy to get these tires for my boat trailer. The radial tires will give better service than the bias tires. They replaced 4.80 X 12 Bias tires. The radials also handle more pounds per tire than the bias. Also, I have at least 8 sets of wheels so I went to the local nationwide department store and their auto department took off the old tires and mounted the new tires for $5.00 each. 616869



- AM10140
by:

Excellent Service.. Fast Shipping... tire looks great on my trailer..being a 10 ply over the old 4 ply makes me feel better taking off down the road.... thanks 149944



- AM10140
by:

Really nice tires at a good price. Arrived in a few days. They installed great on my pop-up camper that had bias tires. Well worth the extra money to get radial tires. I'm very pleased with the fast service and great quality. Had them put on the rims by my local tire store. I just couldn't break the bead to get the old tires off the rim. 430593



- AM10140
by:

This is the exact same O.E. tire on my camper. They are a great tire. This tire was only purchased to have as a spare. I have purchased tires in the past that were made in China ( not this brand) and had constant blowouts. These are better made ( still made in China) and so far I’ve had good luck with them. Please see my review of the rim I purchased for this tire. 565442



- AM10140
by:

I just received the tires today and haven't had them mounted yet so all I can is they look great. Summer before last, we took our pop up camper out West through 18 states in about 60 days. All of our camping up that point had been around Florida where we live, so no long road trips. On our out West trip we had 4 blowouts on our little pop up camper and since we were on the road, we would pick up tire/wheel assemblies from Wal-Mart or Harbor Freight. Did not really know what else to do. Experience has taught us better and that's why I ordered these load range E, 65 mph, 10 ply rating tires. The proof is in the pudding as they say, so in the fall, we will find out how good these tires are and I will write a full review then. 616909



- AM10140
by:

I needed a quality set of tires for my 1959 Lil Loafer camper trailer, the only tires I could find at any tire shop local to me were bias ply and nothing over a load range D. So needless to say those would wear out real fast and not track very will. These Kenda radials will fill the need perfectly. A load range E 10 ply rating will give me the confidence I need when hitting the road. I had them mounted at a local tire shop and took it out for a test run and they sure help the little trailer track nice. Great tire for a little vintage trailer. Delivery was fast as well, less than a week. The price is fair with the exception of the Canadian exchange on the US dollar. And the website works smooth for orders, I'll be back for other stuff for sure. 385741


Comments
The tires are performing very well. We have a longer trip planned this summer so that will give them a good run, but I’m sure they will be great.
Doug K - 05/29/2018

39043

- AM10140
by:

Thanks so much for your help! No repairing this old guy! 561692



- AM10140
by:

Used these tires for a year have work good smooth ride and have handled more weight than recomended a few times no problem 715494



- AM10140
by:

These new tires LOOK great. They smell like REAL rubber. Ordering was an easy process. I really appreciate all the info etrailer has on their web site about each product. Since they will go on my boat trailer I won’t really be able to put them to use until next summer, but I can’t wait to get them mounted up. 707596



- AM10140
by:

Used these on a 5x8 utility trailer. Slightly larger than the original tires, but much better overall performance. Highly recommend! 706756



- AM10140
by:

These tires have actually exceeded my expectations. I've got about 12000 miles on them since I purchased and have had no issues at all. They provide a quiet ride and that was one of the main things I was concerned with when I decided to try them out. Wear has been even and their snow and wet traction performance has been quite acceptable given the wide variety of weather we have in this region. 704273



- AM10140
by:

Needed to replace the tires on my ACME EZ Car Tow dolly, the 12 inch E Load tires are not carried in stock at my normal tire store. ACME trailers did not have any tires available and they suggested I try E trailer for assistance. GLAD I DID, excellent service, I purchased two 12 inch Load Range E tires, and a 2 ton bottle jack. The order arrived ahead of the scheduled date and in excellent condition. I will definitely use this company again. 703503



- AM10140
by:

Good tires, have run them on my pontoon boat trailer and gotten good service from them. 692267



- AM10140
by:

Here's the real deal! I purchased two of these tires, mounted on galvanized rims in 2017. They were mounted on a modified boat trailer that hauls our Hobie Cat as well as a wood storage box with various Totes and an Avon Inflatable as well. Crossing a scale the trailer axle weighs a little over 1300lbs. We haul this rig from Canada to Baja Mexico every year, a round trip of about 8,000Kms. Some of the roads are pretty bad. Lots of potholes! When new these tires tread depth measure 7/32. after two round trips to Mexico the depth is 5/32. No flats, no unusual wear and they run quite cool (at 65psi). I just bought two more for the next trip down (July 2019) and I'll keep the older ones for spares.. . . I expect I'll never need them! If you're looking for a heavy duty 12 inch trailer tire this is the best one that I've found. I've tried other brands of 12 inch trailer tires, some only lasted a few thousand kilometers. One thing though. . . Have them installed with high pressure truck valve stems, not the rubber automobile ones, they will handle the pressure and temperature better. Did I mention they were the Real Deal! Thanks etrailer! 679983



- AM10140
by:

Because of the quality of your tires,I drive with a lot more confidence than at other times. 679598



- AM10140
by:

Excellent tire at a good price. 678047



- AM10140
by:

I just purchased two tires with a load rating of E for use on my EZE tow trailer. E load range tires are not easy to find, and these tires were shipped quickly (received in three days). I wanted to replace the existing tires, since I brought my trailer second hand and did not know the history of the tires that came on the trailer. I needed replacements quickly for a planned RV trip. I place my order over the phone and was treated professionally with a promise that the tires would arrive quickly. 674415



- AM10140
by:

Received the trailer tires in excellent condition, Delivered on time. No review on tires for they are not in use yet. 666549



- AM10140
by:

Product didn't fit but that's on me. Nothing wrong with the product or etrailer's description just me not paying attention enough. 648039



- AM10140
by:

I installed the tires myself which was a challenge as they are very stout tires but it was feasible. Once installed I've been very happy with them. They seem to ride a bit smoother than the bias ply tires they replaced but it could just be my imagination. I really like that they are rated for a heavy load as I typically overload my trailer with the hopes of avoiding multiple trips it gives me more piece of mind knowing they are up to the task. 647605



- AM10140
by:

Nice tire for my boat trailer. 645326



- AM10140
by:

Tires were mounted on a pop up camper. About 800 miles and they are doing great. They have about performed better than expected. 639017



- AM10140
by:

VERY FAST AND FRIENDLY SERVICE. NOAH WAS A GREAT HELP. 638157



- AM10140
by:

yes my wheels and tires were delivered today.i want to thank you for your outstanding service ,support and shipping.i ordered these last friday and I would have never imagined getting them so fast.thank you again for everything! 634778


27
796
Show More Reviews

Ask the Experts about this Kenda Tires and Wheels

  • Can Trailer With ST145/R12 Tires be Upgraded to 13 Inch Tires
    We have ST145/R12 trailer tires with a load range E, the Kenda Karrier S-Trail # AM10140. If you wanted to go to a larger tire and wheel you could do so but you would need to ensure you have the needed clearance of about three inches from your trailer tire to rim and four inches to your trailer frame. A ST145/R12 tire like the Kenda Karrier S-Trail # AM10140 measures 21.3 inches in diameter when inflated and is 5.7 wide. The smallest 13 inch tire is ST175/80R13 quite a bit bigger, measuring...
    view full answer...
  • Highest Speed Rated Radial Trailer Tire Size 145/R12
    The closest we have to what you're looking for is a 145/R12 size tire, Load Range E rated for up to 1,520 pounds at 80 psi, but its speed rating is only 65 mph. It's the only Load Range E tire we have at that size and we don't have any for a 13 inch rim. Another option that may work for you is tire # TT53012C. It's a 5.30R12 size which is about a 1/2 inch skinnier and a 1/*4 inch larger in diameter. It does have an 81 mph speed rating however it's only rated for 1,050 pounds as a...
    view full answer...
  • Tire Recommendation for Trailer with Tire Size 145R12
    We have the tire size 145R12 by itself. For that you would want the part # AM10140. I attached a review video for this tire for you to check out as well. If you happened to need it on a rim with a 5 on 4-1/2 inch bolt pattern you'd want the part # AM31202 or for a 4 lug solution part # AM35351DX.
    view full answer...
  • Kenda Karrier S-Trail ST155/R12 Compatibility With 12x4.5 Inch Wheel
    I reached out to the manufacturer and the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E # AM10140 will fit a 4.5 inch wide rim, however it may change the load capacity as the tire may be stronger than the wheel. If you have a heavy load you are carrying, you may want to have a 12x4 inch rim. We do have some pre-mounted options for that tire: Kenda Karrier S-Trail ST145/R12 Radial Tire w/ 12" Aluminum Wheel - 5 on 4-1/2 - Load Range E # AM31215 Kenda Karrier...
    view full answer...
  • Is Kenda Karrier S-Trail ST145/R12 Available Mounted on Wheel with 4 on 4" Bolt Pattern
    While we do carry the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E (1,520 lbs at 80 psi per tire) # AM10140, we unfortunately don't have this specific tire pre-mounted to a wheel that has a 4 on 4" bolt pattern. Since all of the 12" wheels that have a 4 on 4" bolt pattern have lower weight capacities (1,250 lbs at the most) I recommend checking out the Kenda Karrier S-Trail ST145/R12 Radial Tire Load Range D (1,220 lbs at 65 psi) w/ 12" White Spoke Wheel # AM35351DX....
    view full answer...
  • Recommended Radial Tires To Replace 5.30x12 Tires On 1976 Popup Camper
    For the replacement tires on your 1976 popup camper, I recommend the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E # AM10140. These will be a slightly wider and shorter than your current tires, but will mount to the same wheels. They have a width of 5.7 inches and overall diameter of 21.3, which isn't a very noticeable difference. These tires have automotive grade tread and are rated for 1520 lbs at 80 psi.
    view full answer...
  • What is the Speed Rating for Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire
    The trailer tires we carry are rated for 65 miles per hour at most. Traveling 80 miles an hour will produce too much heat for a trailer tire. The problem is that trailer tires are made with a thicker side wall than passenger vehicle tires. This means that they can get hotter faster and going over the rated speed will lead to excessive heat build up. Excessive heat build-up in a tire can lead to diminished tread life and tire failure. Radial tires dissipate heat better but are still rated...
    view full answer...
  • Wheel and Tire Recommendation, ST145R12 Size with a 4 on 4 Bolt Pattern
    The only wheel and tire combinations we offer for the ST145R12 size and 4 on 4 inch bolt pattern you listed are on aluminum wheels and are not load range E. Check out the Kenda KR25 ST145R12 Radial Trailer Tire and Wheel # AM31208 and the Kenda KR25 Radial Trailer Tire and Wheel # AM31208HWTB. The Kenda Tire # AM10140 that you referenced is a load rang E, but we do not have a 4 on 4 inch wheel with the same capacity as most 4 on 4 inch hubs have capacities near 2,000 lbs. While these...
    view full answer...
  • Recommended ST145/80-R12 Tires for a 2015 Jayco Jay Sport Camper
    In order to replace the ST145/80-R12 tires on your trailer, I recommend using the Kenda Karrier S-Trail Radial Trailer Tire part # AM10140. This tire like your existing have a radial ply which is better for long highway hauls and it comes with a load range E rating which is suitable for use up to 1,520 lbs per tire. It also has a 65 mph speed rating. In regards to the date code you can find this information on the sidewall of the tire. There will be a set of four numbers which are separated...
    view full answer...
  • Can 4.80-12 Tire be Replaced with ST145/R12 Tire Using the Same Wheel
    Yes, the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire # AM10140 referenced in your question will fit the same 12 inch wheel with a 4 inch width that your existing 4.80-12 size tires are mounted to. Just note that the ST145/R12 tire will be about 0.8 inches larger in diameter, so you will want to make sure you have the necessary clearance on your trailer for the slightly larger tire size. This Kenda radial ply tire is going to provide an excellent upgrade over your existing set....
    view full answer...
  • Will 145/80-12 Trailer Tires Fit the Same Wheels as 5.30-12 Trailer Tires
    Trailer tires in sizes 5.30-12 and 145/60-12 (such as # AM10140) both fit the same size wheels so you could use them. Trailer tire # AM10140 is rated for 1,520 pounds at 80 psi. Please note that higher capacity trailer tires will not increase the capacity of the trailer. Both sizes are basically the same height and width with the 145 being slightly shorter. There should not be any clearance issues so there is no reason not to switch to the 145 size. I have included a couple of helpful...
    view full answer...
  • Why Should Trailer Tires be Inflated to Their Max PSI
    With trailer tires you want to always run the max psi. Not only does it allow the tire to have it's max capacity when inflated to the max psi, but it also helps prevent the trailer tire from heating up while on the highway as well help prevent sway that would be caused by under-inflated tires. I attached a help article on trailer tires for you to check out as well.
    view full answer...
  • Will Kenda ST145/R12 Fit on Same Rim as 4.80-12 Tire
    Both tire sizes you mentioned are designed to fit a 12 inch diameter wheel that is 4 inches wide so yes, the part # AM10140 that you referenced would work well for you.
    view full answer...
  • Looking for 4.80-12 Tires for Jet Ski Trailer
    Actually, 4.80-12 tires are still manufactured and we carry them. We sell the tires only, or the wheel/tire combo with the tire mounted on a wheel with a 4 on 4 bolt pattern or a 5 on 4-1/2 inch bolt pattern. If you click the link I provided, you can see our available tires and wheel/tire combos in that size. If you're getting a wheel/tire, be sure to choose the wheel that matches the bolt pattern of your existing wheels. I'll link you to an FAQ article that shows how to determine your...
    view full answer...
  • What is the Highest Load Range ST145R12 Tire Available for 25-Foot Yacht Club Pontoon Boat Trailer
    Yacht Club offers both single- and tandem-axle pontoon boat trailers that come equipped with various tire sizes in load ranges C and E. Based on the 6400-lb combined weight information you provided I think you may have their model PTB2425 trailer since according to the Yacht Club website this is the only one specified to use tires in your 12-inch size and with a load range E rating. The part you reviewed, Kenda S-Trail ST145/R12 Radial Trailer Tire - Load Range E, part # AM10140, is...
    view full answer...
  • Speed Ratings of ST-Type Special Trailer Tires
    Most special trailer-type tires have a maximum speed rating of 65-mph but some tires in certain sizes can have speed ratings as high as 81 mph, which is classified as an M speed rating. If not specifically labelled for a higher speed rating, presume the trailer tires carry a maximum speed rating of 65-mph. Changing your trailer's ST145R12 tires to the 13-inch size, such as Karrier ST175/80R13 Radial # AM10210, can allow safe travel at higher speeds since this tire is M rated for speed,...
    view full answer...
  • What Size Tire Will Fit My Trailer
    I searched our entire inventory at etrailer.com and that tire size isn't a size we've seen used on trailers. Our closest size is 145/80-12. The Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire # AM10140 would be the best example of this size. If you will like to measure to see if the 145/80-12 tires will fit your trailer, please do the following: Measure to see if you have 3 or 4 inches between the tread and the other under side of the fender and 2 inches in between the side wall,...
    view full answer...
  • Do 4.80 x 12 Size Tires Fit the Same Rim as 145/80-12 Size Tires
    Your current 4.80 x 12 tires and the Kenda 145/R12 tires, part # AM10140, both fit on a 4 inch rim so you can use your same rims. However, you want to makes sure you have clearance for the larger tires since they're over half an inch taller and more than 3/4 of an inch wider. You want 3 to 4 inches from the tire tread to the fenders and at least 1 inch between the sidewall and the closest part of the trailer.
    view full answer...
  • How to Determine Tire Age and at What Age Should a Trailer Tire Get Replaced
    The common recommendation is that trailer tires should be replaced at 6-7 years of age regardless of if the tread of the tire is still good. This means 6-7 years after the manufactured date and not just when the tire was purchased. Here's how to tell a tire's age. The DOT number code will be stamped on one side of the tire, near the bead area. This tire identification number will start with the letters DOT, then the next two numbers or letters are the plant code where the tire was manufactured....
    view full answer...
  • Do All Trailer Tires of the Same Size and Load Range have the Same Weight Capacity
    Different makes of tires of the same size and load range can have different weight capacities. So your tire's information is accurate for that tire. There isn't a universal weight capacity for any given tire size for all manufacturers across the board. If the capacity is fine for your trailer then you have nothing to worry about. But if you want to have tires rated for 2,540 pounds at 65 psi then I recommend switching to # TTWSF22515D.
    view full answer...
  • Will ST145R12 Tires Work in Place of 5.30-12 Tires for a Pontoon Boat Trailer
    If you used 4 of ST145/R12 trailer tire # AM10140 the combined capacity would be 6,080 pounds. That is more than enough for the stated 4,200 pounds of your boat and trailer. The 145R12 and 5.30-12 have almost the same dimensions so clearance should not be an issue either.
    view full answer...
  • Availability of Trailer Tire in Size 145R12
    We have the tire size 145R12 by itself. For that you would want the part # AM10140. I attached a review video for this tire for you to check out as well.
    view full answer...
  • Wider Tire Recommendation to Replace 4.80-12 Tire Size
    The widest tire we offer that will fit the same rim as your 4.80-12 tires is going to be a ST145/R12 tire like part # AM10140 which has a section width of 5.7 inches. Overall diameter would be increased by less than an inch. This will give you a tire that is .8 inches wider.
    view full answer...
  • Switching From ST5.30-12 Load Range D Tires To ST145R12 Load Range E Tires On Jayco Camper
    I would recommend switching from the ST5.30-12 tire size to the ST145R12 size because the advantages of going to a radial design tire. Because of the construction of a radial tire, the tire has more flex and will allow for more ground contact. That will improve traction and better tread wear. It also gives the radial tire better stability. The radial tire will normally run cooler, if not overloaded, which will help the tire last longer, especially when the tire is under a load. You...
    view full answer...
  • Can a 12 Inch Trailer Wheel Handle a 145/80-12 Load Range E Tire at 80psi
    A 14 inch steel wheel can handle the additional pressure of a 145/80-12 load range E tire # AM10140. You will likely need to replace the valve stems. valve stem # AM20904 is rated up to 80 psi and fits a 0.453 inch diameter hole. Please note that going to a higher capacity tire will not increase the capacity of the trailer. Trailer tires should be inflated to the maximum psi indicated on the tire. I have included a link to our help article on trailer tires for you.
    view full answer...
  • 145/R12 Load Range E Trailer Tire and Aluminum Wheel with 4 on 4 Bolt Pattern
    There are so many possible tire and wheel combinations that manufacturers have chosen to provide only the most common set ups. But a local tire shop will be able to mount a tire on a wheel for a nominal fee. For a 145/R12 Load Range E tire we have # AM10140. For 12 inch aluminum wheels with 4 on 4 bolt pattern there are a few options: # AM22318HWT # AM22318HWTB I have linked videos for each of the wheels and the tire for you.
    view full answer...
  • Wider Tire Recommendation for 5.30-12 Size Tires that Keep Blowing Out
    There are a few different reason why you would be getting blowouts; 1) tires are not inflated to the correct psi, 2) trailer is loaded for weight that is higher than the weight capacity of the tires, 3) tire sidewalls are damaged due to hitting curbs, 4) the max speed rating of the tires has been exceeded. The most common combination leading to blowouts is reasons number 1 and 4; improper inflation and exceeding the speed rating. Both will cause the tire to overheat and ultimately blow. The...
    view full answer...
  • Replacement Tires for 12 Inch Rims on Trailer that is Used on Highways and Off-Road
    Even though you do ride over bumpy roads part of the time I would still stick with radial tires if they're available in the size you need. Bias tires are generally better for off-road conditions but the radials can handle some bumps in the road too. And the advantages of a radial tire on the highway will have a great impact over the bias on rough roads. I've linked our selection of tires that fit 12 inch rims. If you can tell me your exact tire size I can make a more specific recommendatio...
    view full answer...
  • Will a ST145/80R12 Trailer Tire Replace a 4.8-12 Trailer Tire
    Yes, 4.8-12 trailer tires and ST145/80R12 tires are both designed to fit a 12 inch diameter rim that is 4 inches wide. The only thing you will need to consider is vertical clearance. The Karrier S-Trail ST145/R12 Radial Trailer Tire # AM10140 that you referenced will be a little less than an inch taller. So if you have a fender above the tire you will need to consider this change in clearance. I attached an FAQ on trailer tires for you to check out also.
    view full answer...
  • What is Recommended Tire Pressure for Trailer Tires
    When inflating trailer tires the recommendation is to inflate the tire to the max tire pressure listed on the sidewall when the tires are cold. So if your max pressure is 80 then that is what you would need to inflate to when cold. The increased pressure when hot is normal. Ideally in your situation where the temperature range is so extreme you would inflate the tires while cold in the temperature that they would be cruising in. If you don't inflate to max pressure the tires will...
    view full answer...

Do you have a question about this Tires and Wheel?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality tires and wheels for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate tires and wheel information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Updated by:
Laura H
Updated by:
Mary E
Updated by:
Isabelle B
Installed by:
Cole B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.