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  1. Trailer Tires and Wheels
  2. Kenda
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  4. 13 Inch
  5. 185/80-13
  6. Load Range D
Loadstar ST185/80D13 Bias Trailer Tire - Load Range D

Loadstar ST185/80D13 Bias Trailer Tire - Load Range D

Item # AM1ST79
Our Price: $84.63
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Trailer Tires and Wheels
Shipping Weight: 19 lbs
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Kenda Trailer Tires and Wheels - AM1ST79
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Top-quality, bias trailer tire has been rigorously tested to ensure that it exceeds Department of Transportation standards. This tire fits 13" wheels; its maximum load is 1,710 lbs at 65 psi. Great Prices for the best trailer tires and wheels from Kenda. Loadstar ST185/80D13 Bias Trailer Tire - Load Range D part number AM1ST79 can be ordered online at or call 1-800-940-8924 for expert service.
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Kenda Trailer Tires and Wheels - AM1ST79

  • Tire Only
  • 13 Inch
  • 185/80-13
  • Load Range D
  • Bias Ply Tire
  • M - 81 mph
  • Kenda

Top-quality, bias trailer tire has been rigorously tested to ensure that it exceeds Department of Transportation standards. This tire fits 13" wheels; its maximum load is 1,710 lbs at 65 psi.


  • Flatter tread offers improved stability for excellent handling
  • 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
  • Advanced rubber compound
    • Longer tread wear
    • Low rolling resistance for smooth ride
  • Bias tire meets DOT requirements


  • Fits: 13" x 4-1/2", 13" x 5" and 13" x 5-1/2" wheels
  • Tire size: ST185/80D13
    • Section width: 7.2"
    • Outer diameter: 24.4"
  • Capacity:
    • Load range: D
    • Ply rating: 8
    • Maximum load:
      • Single tire: 1,710 lbs at 65 psi
      • Dual tires: 1,520 lbs at 65 psi
  • Maximum speed: 81 mph (speed rating M)
  • 5-Year limited warranty
  • 1-Year worry-free guarantee

1-Year Worry-Free Guarantee

This tire has a 1-year worry-free guarantee. If within the first 12 months the tire is damaged in any way, it will be replaced at no charge.

Bias Tires vs. Radial Tires

Bias vs. radial tire graphic

Bias ply tires are designed for off-road or agricultural applications. They are built with thick, durable nylon cords that are positioned at a 30- to 45-degree angle to the direction of travel. The layers alternate in a crisscross pattern, making the sidewalls stiffer so that the entire tire is able to flex easily. As a result, the tire provides a smooth ride and improved handling when trailering on uneven surfaces.

1ST79 Loadstar K550 Bias Tire - LR D

Customer Satisfaction Score:

Customer Reviews

Loadstar ST185/80D13 Bias Trailer Tire - Load Range D - AM1ST79

Average Customer Rating:  4.8 out of 5 stars   (3169 Customer Reviews)

Top-quality, bias trailer tire has been rigorously tested to ensure that it exceeds Department of Transportation standards. This tire fits 13" wheels; its maximum load is 1,710 lbs at 65 psi.


This is the first time I have ordered trailer tires from Etrailer and I did not know what to expect with regard to service and product quality. The last pair of tires I had on my pontoon boat trailer were 185/80R13 Marathon tires but according to the specifications, the Etrailer 185/80R13 tires had a better load rating and higher safe speed rating than my old Marathon tires. My Etraier tires also have a 2/2018 date of manufacturing which was also a plus.



Great ... I sold my pontoon boat recently but the tires exceeded my expectations. I now go to Etrailer for tire recommendation and technical advise. I recently bought a spare tire and rim for my new Venture trailer from Etrailer. Thanks, PW


Tires arrived quickly, package well, and best of all they are only two months old. Will evaluate tires as time goes by, but did a great job of fulfilling my order.

John D.


After having these tires for a year, I must say I am pleased. They are wearing well, hold air great, and offer a good ride.


After researching tires for several days, watching etrailer videos and reading all the Q&A's, I decided on this particular size and brand because they're excellent in quality and couldn't find any local dealer that carried them. I ordered the tires, steel wheels and baby moon hubs all together to go on a 15' Scotty camper.
They look great and I would recommend them to anyone who needs a smaller, yet durable tire.


These seem to last a lot longer than the load C tires. They have worked great on my hunting boat trailer.

Scuba K.


Tire is running great and wear just like it should.


Excellent service!! The order came in very fast and I would highly recommend anyone to order there tires for you guys in a heartbeat. The product was shipped in in individual boxes so nothing else could touch the tires and I was in pressed by that also.


These tires are great! Not too many miles on them yet but they ride well. The load range of these tires is great too. The awesome part of this purchase was the tires shipped the same day I ordered them and they arrived in four days! Great customer service!


I can't really evaluate the tires yet...The arrived in only 2 days and the boxes they were shipped in looked brand new!! Unpacked one tire...appearance was excellent. This is the second set of "Loadstar ST185/80D13 Bias Trailer Tire - Load Range D" that I have purchased and will write more in a couple of weeks after I get them mounted. Thanks for the great service and unbelievably fast shipping!
Great service E-Trailer!!


Got new loadstar tires for my coleman Fleetwood Rio they look great and ride even better. The ride over all is smooth and stable.


I used these on my ATV trailer...The Load Range D makes a huge difference over the Load range C sidewalls. No more bouncing or swaying from sidewall flex. It really improved the ride quality of the trailer and are much tougher than most other trailer tires offered for a 13 inch rim.


Excellent order with fast Delivery and they exemplify my rims and trailer.


tires came packaged well. we will see how they work when i get them mounted and on the trailer.


Tires look good. Will have them mounted tomorrow. Where somewhat out of shape from being packaged tight. Hopefully they will shape up when mounted.



750 miles on the tires and no problems.


So this is the second set of these I have ordered for my 2001 Palamino Pop Up. The first set held air pressure all 10 years I had them and we took 25 trips with them (I just checked that fact the other day). So we had no problems until one popped on the interstate. At 10 years old, not a surprise nor disappointing.

Now the last set I ordered were already on rims mounted and balanced. These new ones came packaged as tires only. The my are way deformed for shipping and folded on half. We will see if they right themselves under air pressure. Not sure how they will get mounted. I used a mounting and balance machine a long time ago only an Army auto craft shop. Can’t imagine how these will turn out. I will update my rating if the experience is a debacle. If the tire shop thinks nothing of it, I will leave myv5 star rating as is.



The tires are perfect. They mounted just fine and ride just fine. Still holding air and haven’t added any in a year. We don’t pull it much these days, but I am confident I have a solid tire.


I have never ordered tires online or for a trailer before this experience. They had exactly the tire that I wanted in the correct size that I wanted. That made it very simple to just call them up and order. We received the tires in 3 business days. We have not taken a trip on these tires yet but I expect them to be just fine when we do. If you are looking to replace original tires for your camping trailer, this is the place to look first. I will return here for future trailer needs.

Melissa K.


Only took one trip on them last summer. One tire went flatlow sitting over the winter. We have kept it aired up during the spring, not sure if this is due to the tire or how they were installed on the trailer. never had that happen on the original tires in 6 years. So a little worried about what might happen on the one trip we plan to take this summer. any advice?

Etrailer Expert

Rachael H.


The problem you are describing may be associated with how the wheel was installed on your existing rim, or potentially with the valve stem. If the tire is no seated properly on the wheel, and if the valve stem is bad, or does not have a good seal, you may experience slow air leaks overtime.


I bought these tires to put on my travel trailer. The outside and inside treads are wearing faster than the 3 center treads. I always check the pressure before getting on the road and both tires are inflated to 65 pounds.
I only have 18 thousand miles on them. I'm very disappointed in the wear pattern.

Etrailer Expert

Mike L.


Tire treads that are worn at the edges would typically indicate an under inflated tire. Have you tired a different tire gauge in order to confirm your readings? If the pressure is fine, a bent axle or worn suspension parts could certainly cause the wear you describe, as well. The tires are covered by a 2 year warranty. Please call our Customer Service folks at 800-298-8924 for details.


Tires were sent very fast and well packed in a box, not just shrink wrapped. The tires themselves are by far a better tire than what came on my boat trailer. They are almost twice as heavy as the originals and much stiffer sidewall. They pull better than the old tires ever did. Their price beat any I could find here on a comparable tire. I will be getting in touch with them when I need tires again. I would rate them A- double plus.

Bruce B.


I have put many miles on these tires, including many back roads and trails, and have had no problems with the tires. They show very little wear for the amount of miles and abuse they have had. Would I buy them again? In a heartbeat!!!


This rating is for customer service and assistance in purchasing new tires for my pop-up camper. Since I have just received the tires I can't honestly rate them. But if they perform as well as ETRAILER I'm sure I will be a happy camper. I ordered the tires on Thursday and they were delivered the following Wednesday. Thanks for the recommendation, the quick delivery, and a fair price. I'm sure this won't be my last purchase.

Doug P.


I have made several long distance and a few shorter trips with these tires over the past year. The roads vary from Interstate Highways to country backroads. The tires have performed flawlessly under a wide variety of weather conditions. I am completely satisfied. And as I predicted this wasnt my last purchase from etrailer. Thanks for great products and great service.


Fast shipping, easy to mount, good price, trailer seems to tow better, more stable. Only place I found Load range D tires

Ron S.


Still satisfied


The replacement tires were for my boat trailer, and have held up well. The professional customer Service provided by your team was excellent! Keep up the good work, thanks!


Super fast shipping. I buy new tires every five years for my pop-up, and with the Loadstar tires have never had a tire issue. I am very satisfied with the service I get from these tires. Also, E-trailer has the best price that I have found anywhere. I would recommend these.

Mike L.


working great.


I placed my order on Friday and had my tires by Tuesday. Excellent customer service and no shipping fees to boot. Easy ordering, no hassle and they kept me informed all along the way of where my tires where. I have not worked with this company before, but will in the future when there is another need. I would recommend etrailer to friends and family. Totally satisfied customer

Kim S.


I ordered my tires on a weekday and poof they appeared within a day or two. Awesome customer service. I ordered 2 replacement tires and shortly thereafter I sold my popup to my brother who drove it from North Carolina down to the Keys where he lives - he has made multiple trips throughout Florida and has not had any problems at all with the tires and wanted to make sure he knew where I purchased them when it time to replace. Will definitely be a repeat customer. These people do an awesome job!


Perfect! Exact replacement tires for my 26’ enclosed snowmobile trailer! I’ve always loved dealing with etrailer in the past and what makes it even better was they had the best price! Excellent quality. FAST shipping!



Tires are still running strong!


This buldge doesn’t seem correct.

Etrailer Expert

Heather A.


These tires are shipped flat and should take a normal shape once the tires are inflated.


These tires are great for my Fleetwood redwood Popup, actually were original equipment when my popup was new. I looked everywhere, this is the best tire you can get in this size, etrailers
price was great when you figured the free shipping, got them within
a weeks time. Walmart mounted them and did heavy duty valve stems and kept the old tires for a total of 18.00
Make sure you run these at max pressure to insure even wear, previous owner of my popup ran them low and I had serious wear on the outer edges I run my tires at 65psi


Loadstar ST185/80D13 tires are replacing the ST 175/80C13 on my Scamp camping trailer. These are the only tires that have a 1725 lb load rating in this size. The rest of the tires are hundreds of lbs less and do not allow much of a safety margin when the camping trailer is loaded. First time buying Kenda trailer tires. I have had great tread life and road handling with my Kenda motorcycle tires. has great info on their web site and the tires were quickly delivered in boxes, not just shipped naked with a shipping label on them.

Show More Reviews

See what our Experts say about this Kenda Trailer Tires and Wheels

  • Speed Rating of Kenda Tire part # AM1ST79
    The speed rating for the Kenda Tire part # AM1ST79 that you referenced is 65 mph. 65 mph is the speed most trailer tires are rated at. Exceeding this rating will cause heat build up which will eventually cause the tire to fail.
    view full answer...
  • Trailer Tire Replacement for Tire Size B78-13ST
    For a B78-13 trailer tire, the closest match we will have will be a 185/80-13. The best option in that size is # AM1ST79 which has a capacity of 1,710 lbs at 65 psi. So it would be more than enough. I attached a review video for this tire for you to check out as well.
    view full answer...
  • New Trailer Tires Appear Deformed
    When trailer tires leave the manufacturer, they are palletized. When they are placed on the pallet, the tires are compressed in order to save space and reduce shipping costs, as you can see in the provided photo. Although they might look a bit alarming, there is actually nothing whatsoever wrong with the tires. Once mounted on rims and inflated, they will be perfectly safe and will preform very well for you. We sell hundreds of trailer tires on a weekly basis, and this has never presented...
    view full answer...
    Image 1 for
  • Recommended ST185/80/R13 Trailer Tire With M Speed Rating
    I have the perfect tire for your trailer. For a ST185/80R13 trailer tire with speed rating of 70+ mph, I recommend the Loadstar ST185/80D13 Bias Trailer Tire - Load Range D part # AM1ST79. The Loadstar is a bias ply tire with a load range up to 1,520 lbs if used on both sides of the trailer in addition to an M speed rating capable of speeds up to 81 mph. They also come equipped with a 2 year warranty. I have attached a video review of this tire for your viewing.
    view full answer...
  • Availability of Replacement Trailer Tires for Obsolete Tire Size 7.00x13
    The 7.00 x 13 tire you mentioned is an obsolete size, and is no longer available, from what I can determine. The closest replacement we have is part # AM1ST79 which is a bias ply tire, size ST185/80D13. The tire is rated for 1,725 lbs per tire at 65 psi. The diameter of your original tire is about 25.88 inches, while the replacements will be just a bit smaller at 24.65 inches in diameter. For best tire life, trailer tires should be kept inflated to their maximum, which is 65 psi in this...
    view full answer...
  • Should Trailer Tires Be Inflated to Their Max Psi Rating When Cold
    Trailer tires are designed to be inflated to their max psi when they are cold and can handle the increased pressure that comes when they heat up from driving. The only real way they will get too hot and fail is if you exceed the speed rating for the tire. Special trailer tires are usually rated to operate at a maximum speed of 65 mph. If you exceed 65 mph, heat could build up in the tire and cause it to break down and fail. If a tire is rated to run at a higher speed, this information...
    view full answer...
  • Trailer Tire Replacement for Size C78/13
    The modern tire size equivalent to the C78/13 is the size 185/80-13 so for a tire in that size the part # AM1ST79 would work perfectly.
    view full answer...
  • Tire and Wheel Combos for a Boat Trailer with ST185/80-13 Tires
    Yes, we do have ST185/80-13 tire and wheel combos, see link, but they are all bias ply tires, not radials. We currently do not carry a radial tire in size 185/80-13. All of the tire and wheel combos in the link have a 5 on 4-1/2 bolt pattern. And they are all rated for 1,725 pounds at 65 psi. If you are changing one tire and wheel you will want to change the other side at the same time to ensure even tire wear and tracking behind the tow vehicle.
    view full answer...
  • Can Trailer Tires Rated for a Combined 3450 Pounds be Used on a 3500 Pound Trailer
    You are very close to the capacity but I would still try to stay under the lowest rated component in the system which in this case would be the tires. If you are always at 3500 pounds, the max capacity of the axle, then I would go with a higher capacity tire. Trailer tires should always be inflated to the maximum psi as indicated on the tire for longest life and to reach their maximum weight capacity. What this means is that you would have to go to a 14 inch tire and wheel. If this is...
    view full answer...
  • Recommended Boondocking Tires for Rockwood A194HW
    If you have off-roading in mind then a bias ply tire will suite you best as they are better at holding up to off-road abuse without punctures. The Loadstar ST185/80D13 Bias Trailer Tire part # AM1ST79 is a great option for this with 8 ply, load range d rating. These tires also have a 81 mph so they will be good for long highway trips as well.
    view full answer...
  • Any Issues Going from a ST175D13 Bias Tire to a ST185D13 Radial for 19Ft Boat Trailer
    If your original tires size was ST175/80-13, like # AM1ST79, the new tire will only be 5/8 on an inch taller and 13/32 on an inch wider. As long as you have the clearance, the height of the new tire will not be an issue. As for the difference between a radial and bias tire, I recommend a radial tire especially if you are doing a lot of highway towing. Bias tire do have a stiffer sidewall over many radial tires, but the issue with bias tires is they cannot dissipate the heat like radial...
    view full answer...
  • What Is The Difference Between Load Range C And Load Range D Tires For Trailer
    The difference between Load Range C and Load Range D tires is load capacity and psi rating. The tire you mentioned, part # AM1ST79 is a Load Range D tire and has a maximum load capacity of 1,710-lbs at 65 psi when used as a single tire and 1,520-lbs when used as a dual. We do not offer the St185/80-13 tire with a Load Range C rating.
    view full answer...
  • Trailer Tire Size 185/80-13 with Load Range D and Speed Rating Over 65 MPH
    We do have a 185/80-13 Load Range D tire rated up to 81 mph however, it's a bias ply tire. It's part # AM1ST79 and the only tire we carry in that size. It's weight capacity is 1,710 pounds at 65 psi.
    view full answer...
  • Can 13 inch Trailer Wheels/Tires Travel 65 MPH on Highway
    13 inch trailer wheel/tires like the size 185/80-13 like part # AM1ST79 are rated for up to 81 MPH. Most trailer tires are only rated for 65, so if 65 is the limit you have then you'd be good.
    view full answer...
  • Trailer Manufacturer Calls for 185/80-13 Tires- Can 175/80-13 Tires Be Used Safely
    As a general rule, we typically recommend that folks follow the vehicle/trailer manufacturer's recommendations to the letter. However, the ST175/80R-13 tires you're wanting to use are only 1/2 an inch smaller in diameter and have a tread width of only 1/4 of an inch narrower than the recommended tires. That small of a size differential won't have any negative effects. The ST175/80R-13 tires will work fine. I'll link you to an FAQ article on trailer tires that you might find helpful.
    view full answer...
  • Replacement Trailer Tire for Size ST185/80-13
    Yes, we do carry one trailer tire that is size ST185/80-13 but it's a bias ply tire instead of the radial tire size that you mentioned. The part # AM1ST79 is the correct size but it is a ST185/80D13 instead of R13 which means it's a bias ply.
    view full answer...
  • Modern Tire Size Equivalent to 7.0-13 For Trailer
    The closest modern tire size to the size you mentioned of 7.0-13 is the size 185/70-13 which has a similar section width at 7.2 inches like the part # AM1ST79. This tire also has an overall diameter of 24.4 inches.
    view full answer...
  • How Much PSI To Inflate Loadstar ST185/80D13 Bias Trailer Tire
    In regards to trailer tires, you must fill them to the cold psi rating rating listed on the sidewall of the tire. There are pretty much no exceptions to this. This is the psi the trailer tire manufacturer determined is best for support and temperature. The Loadstar ST185/80D13 Bias Trailer Tire part # AM1ST79 lists to 65 psi which is what I recommend.
    view full answer...
  • Are the Loadstar Tires # AM1ST79 Tubeless Trailer Tires?
    The Loadstar ST185/80D13 Bias Trailer Tire # AM1ST79 that you referenced is a tubeless tire. Check out the picture I attached that shows a zoomed view of the tire where it says tubeless. I also attached an FAQ on trailer tires for you to check out.
    view full answer...
  • Will 185/80D13 Trailer Tire Fit On A 13 inch x 4 inch Wheel
    When installing tires on a wheel, the tire will have a range of wheel widths it will fit on, which is 1/2 inch either way. In this case a 185/80D13 will work on a 13 X 4-1/2, 13 X 5, 13 X 5-1/2. The best fit is the middle of that range, which is 13 X 5. We currently do not offer a tire that will fit on a 13 inches X 4 inches wheel.
    view full answer...
  • Why Should Trailer Tires be Inflated to Their Max Pressure Rating
    You will want to inflate the tires to the max psi that the tires have. Trailer tires always need to be inflated to their max pressure to ensure you get their full capacity. Also if they aren't fully inflated the tire can have heat build up which will also cause premature failure. I attached a link below that has more trailer tire info for you to check out as well.
    view full answer...
  • Recommended Replacements for 185/80-13 Tires On 4-Bolt Rims
    If you just need tires, I recommend the Kenda Loadstar ST185/80D13 bias trailer tire Item # AM1ST79. it is a top-quality bias tire made for trailers that exceeds DOT standards. This tire has the durability and stability of a radial tire. You mentioned that you have 6-ply tires and these are 8-ply but will this not be an issue. It fits 13 inch wheels and has a maximum load of 1,710-lbs at 65 psi. Before making a choice, check dimensions on trailer and determine needed weight capacity...
    view full answer...
  • Tire Recommendation in Size 185/80-13 with 1,600 lb Per Tire Capacity
    In your tire size of 185/80R13 we have a Load Range D like part # AM1ST79 which has a capacity of 1,710 lbs at 65 psi.
    view full answer...
  • Replacement Trailer Tire Recommendation for Size B78-13ST
    For a B78-13 trailer tire, the closest match we will have will be a 185/80-13 like the part # AM1ST79 which is our only option in this size. I attached a review video for this tire for you to check out as well. This is a bias ply tire with a capacity of 1,710 lbs at 65 psi.
    view full answer...
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