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

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

Item # AM10130
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Radial special trailer tire with automotive-grade tread has a ply rating of 8 and a 1,220-lb max load at 65 psi. Designed for highway use. Constructed of double steel belts and full nylon plies. Fits 12" wheels. Lowest Prices for the best trailer tires and wheels from Kenda. Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D part number AM10130 can be ordered online at or call 1-800-496-5010 for expert service.
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Kenda Trailer Tires and Wheels - AM10130

  • Tire Only
  • 12 Inch
  • 145/80-12
  • Load Range D
  • Radial Tire
  • M - 81 mph
  • Kenda

Radial special trailer tire with automotive-grade tread has a ply rating of 8 and a 1,220-lb max load at 65 psi. Designed for highway use. Constructed of double steel belts and full nylon plies. Fits 12" wheels.


  • 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


  • Fits: 12" x 4" rims
  • Tire size: ST145/R12
    • Section width: 5.7"
    • Outer diameter (when inflated): 21.3"
  • Capacity:
    • Load range: D
    • Ply rating: 8
    • Maximum load: 1,220 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.

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.

10130 Kenda Karrier KR25 S-Trail ST145/R12 Radial Tire - LR D

Customer Reviews

Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D - AM10130

Average Customer Rating:  4.8 out of 5 stars   (1533 Customer Reviews)

Radial special trailer tire with automotive-grade tread has a ply rating of 8 and a 1,220-lb max load at 65 psi. Designed for highway use. Constructed of double steel belts and full nylon plies. Fits 12" wheels.


Tire was back ordered, I waited, not needed right away. New tire has a date code of 5/21, 14 months old already. Also ordered a halogen light. The box was 2.5 times too big. Halogen light was unwrapped and unprotected in the box. I hope it works. Big fail on this one!

I am so sorry that this happened to you! Was your light damaged in any way?
-- Etrailer Expert Sierra K - 07/15/2022
Light was scratched, and cover had rubber marks on it from the tire. I was replacing an identical light. My old cover was fine, so I used what I had. I made it work.
-- comment by: Stephen - 07/18/2022


Ordered 5/26 with a promise of delivery 6/3 .. tires were delivered 5/28 .. $10 less than my local dealer if he could even get this model .. he is a Kenda dealer, he did relate Kenda trailer tires are the best out there. etrailer is the best.

Been on over a year still looking like new. Tread wear is excellent, no indications of any stress on sidewalls, no cupping or any othe indication of uneven wear. Thoroughly satisfied. Would buy again, but given how they are wearing it may be a few years.
William - 06/03/2022


Great fit. Was just what I wanted. Was time to get rid of the old bias ply tires. Used them for a couple of hundred miles and over some rough mountain roads. Held up well. Looks like a winner!


I used these tires on my wife's pop up camper. The camper is 1,900 pounds dry with no gear. With coolers, chairs and other camping gear, I would guess 300-400 more pounds. Tires are holding up good.

My wife sold the camper. I assume that the tires are still good.
Daniel - 08/19/2022


I put the four tires on my pontoon boat trailer. I've drove all around the upper Midwest about 2,000 miles and the trailer tires have been working perfectly very happy with the tires and the customer service was excellent, would recommend these tires to anybody.


Impressed. Replaced bias ply tires with these radials on a trailer pulled by a motorcycle. They have made a definite improvement. No sway and trailer does not bounce when traversing potholes or railroad tracks.

Very satisfied. Will buy again.
John - 04/28/2022


I ordered a set of tires for my trailer and they were priced right and shipped promptly. Great customer service.


I bought these for our 4 x 8 Carryall trailer. My sister and I use the trailer behind our Subarus a lot for hauling stuff to, from, and around our little farm, hauling the 4 wheeler, kayaks and canoes, when we go camping, hauling firewood, gravel, fertilizer, etc. etc. etc. It's cheaper than having a truck!

Overall I am impressed. Surprised at first by how they were packed - tread to tread in a large heavy cardboard box. I've bought other small tires elsewhere and had them come so tightly banded together that it made it hard to spread the beads to get them to seat. I mounted these with a couple old tire irons we have here on the farm, took less than 5 minutes for the 2, (I'm a 72 year old woman) they took air right away and the beads seated with less than 20 PSI.

They look good! They are a little bigger in diameter and in tread width. The 4.80/12 tires they replaced always looked... skinny. These look like real tires. The tread pattern is impressive too. It's a water moving automotive design, not the squiggly grooves of the old tires.

I was always concerned putting 90 PSI in the old ones in order to carry the weight, especially as they are now almost 20 years old, weather cracked and well worn. These new tires max inflate at 65 PSI.

We had 6" of snow the day after I mounted them and I had to go pick up some lumber. The trailer handled beautifully on the snow covered and then wet roads. It rides nicer too, not as jumpy as it was empty. Time will tell how they hold up, too soon to tell.

But.... as noted above, they are noticeably wider than the 4.80s they replaced, they extend beyond the fenders about an inch, a fact I had not anticipated. They threw an awful lot of slop on the lumber from the wet roads, and I'm concerned that a heavy load might bring the outside flange of the fender into contact with the tread. I guess I'm going to have to do something about the fenders. Time to fire up the welder! LOL

Well we cut the fenders in half lengthwise fired up the welder and added 2 inches to their width. That resolved the issue of the tires throwing slop. Taint particularly pretty, but its functional. As for the tires, they are fine. Weve run them a year now, out on the road and around the farm. Im pleased with them. We tend to load our trailer heavy, just had 560 board feet of green lumber on it, the tires didnt seem to mind at all. Except for the mud on them, they look as good as new. They ride well, have not given me any issues at all.
Tall S - 11/04/2021


Ground shipping was free and took only a couple business days which was impressive over the holiday weekend. Wheels/tires look great--very happy so far, can't wait to get them on the skiff trailer. etrailer had the heavier rated tire for this rim size, most were the nylon biased ply--these tires give a better piece of mind for running longer distances given the awful construction conditions in NE FL!


Nice tires for a small trailer


These tires are exactly what i needed. They came fast and didnt cost an arm and a leg. Tractor supply tires didnt last a month hauling my Z turn mower. They had a poor load rating of 745lbs. These are rated at 1220lbs and handle tye weight of my mowing equipment without fail. I will be ordering a backup set soon!


Kenda has been around since 1962, so I'm guessing these tires will be good. They certainly look good, and needed very little weight for balance, which is a sign of quality.
I also wanted Radials, as here in Texas we have lots of straight, high speed highways.
If there are any problems, I'll do a follow-up.


The tires have been great! We just returned from a 3,500 mile trip through Nevada, Utah, Arizona, and Colorado. The tires performed great going at speeds of 75+ mph.


Fast shipping. Your Q&A section had the explanation for the exact tire I needed. Very helpful.

Tires are on a small pull behind motorcycle trailer. After a year now I still havent had to add air and Ive noticed no wear pattern. Seems like good quality
Richard - 08/10/2022


Great wheel and excellent tire. Arrived quickly and well packaged!


Excellent fit for my King trailer


Works well with the Harbor Freight trailer. The stock tires are trash. I think these will be a vast improvement

After a year and 1000s of miles the tires have been outstanding. Im taking another 900 mile trip in a month and feel good having proper tires on the trailer on 95
Martin C - 08/17/2021


They processed my order super fast and now I can get back to fishing with my new trailer tires.

Tires are still in great condition a year later.
Jonathan - 10/18/2021


Kenda S-Trail ST145/R12 is a quality radial tire with lots of extra strength from its "D" load range and these Kenda's come with a reasonable maximum tire inflation pressure of 65psi at higher load ratings than those other tires with recommended near 100psi inflation. At near 100psi the other tires are as hard as rocks, defeating the very purpose of using an air-filled rubber tire in the first place. These Kenda's give great shock-absorption at 50 psi, they have lots of extra side wall strength and tow straight as an arrow. I've had one of those other high-pressure tires blow up and it was not a fun experience. Although it may have been from a leak, that skinny high-pressure tire tossed parts of itself all over the highway, and it gave my vehicle a rooster-tail of smoke. I crawled home on the rim !


The new tires look great! Still need to get them mounted, but look to be a great replacement set of tires for my camper. I can now drive down the highway with the piece of mind that my tires are in good shape.


These tires are exactly what I need to keep my wildland fire equipment trailer rolling down the highway. I have been going through bias ply tires every 1500 miles. I'm looking forward to much longer road trips without having to change tires. Thank you for your quick delivery on a quality tire.


I ordered 5.30 x 12 mounted trailer tires. They were back ordered for months. Emily was very helpful changing my order to ST145/R12 tires. Thank you!!



These are excellent trailer tires! Those I had before were supposedly quality tires, but they were 90 psi bias ply. Road like a go cart, beat the crap out of my boat and trailer and constant noise from back there, plus were toast in 2 years.

When I had the Kendas mounted and balanced the ride was super, at the lower 60 psi and radial construction. They roll so much easier than the older tires that I’ve noticed an increase in fuel economy when towing, for real!??


Excellent tires


I have purchased two tires from The service was excellent.

Erik - 04/30/2015

Show More Reviews

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

  • How to Determine Trailer Tire Weight Capacity
    On the sidewall of the tires there should be a weight capacity listed as well as an air pressure maximum value. Trailer tires should always be inflated to their maximum tire pressure otherwise the capacity of the tire diminishes when below max psi. Wheels can be a bit harder to determine the capacity. However, most of the time the wheels will have higher capacities than the tires. So if the tire capacity is good the wheel capacity should be good as well. If you can track down a manufacturer...
    view full answer...
  • Can a 4.80-12 Trailer Tire Be Replaced with a 145/80-12
    Your 4.80-12 tire has an overall diameter of 20.5 inches, a 145/80-12 tire will have an overall diameter of 21.3 inches. The fender clearance difference you would see with the taller size would be .4 of an inch. If you can fit an additional .4 of an inch between your current tire and the fender the part # AM10130 would work well. There is no trailer tire size that has a smaller increase in tire diameter for you going from the 4.80-12.
    view full answer...
  • Can a 4.8-12 Trailer Tire be Replaced with a 145/80-12 Trailer Tire
    Both the 4.8-12 and the 145/80-12 will fit on a 4 inch wide rim. However, the 145 will be taller by about 13/16 of an inch so you will want to make sure that there is space above the tire for the larger size. The 145 will also be wider by nearly an inch so you will want to make sure you have space between the back side of the tire and the trailer for the wider overall size. Adding a trailer tire with a higher capacity will not allow you to carry more weight. You have to go by what the...
    view full answer...
  • Is a ST145/R12 Tire Size Wider than a 5.30-12
    Yes, but not by much. The ST145R12 tire size is 5.7 inches in width whereas the 5.30-12 is 5.6 inches wide.
    view full answer...
  • Can a Bias Ply Trailer Tire be Used as a Temporary Spare in Place of a Radial Tire
    Yes, in the event you need to use the spare you can mix the construction types (bias and radial). But you will want to get them matched up again sooner rather than later or the trailer will not track properly and you will end up with uneven wear. But yes, as a spare this is perfectly acceptable.
    view full answer...
  • Will Radial Trailer Tires Bounce Less than Bias-Ply Tires
    A radial tire flexes more than a bias tire, giving it better ground contact, traction, stability, and tread wear. With that being said, a radial tire should flex more and not bounce as much as a bias-ply tire, but you should also note that unless otherwise noted trailer tires are not rated to exceed 65 miles per hour. 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 should be listed...
    view full answer...
  • Is Listed Capacity for Kenda Karrier S-Trail ST145/R12 Trailer Tire for a Single Tire or Per Axle
    The weight capacity rating for trailer tire # AM10130 is, as you have stated, 1,220 pounds at 65 psi. For a single axle the capacity as far as the tires would be 2,440 pounds. But if the axle, hubs, or suspension is rated lower then that is the capacity you would need to go by. I have included a link to our help article on trailer tires for you.
    view full answer...
  • What is the Diameter Difference Between a 5.30-12 Trailer Tire and a 4.80-12 Trailer Tire
    There is a diameter difference of approximately 1 inch between our 5.30-12 trailer tires and 4.80-12 trailer tires. Our 5.30-12 tire have an outer diameter of 21.9 inches. Our load range C 4.80-12 trailer tire has an outer diameter of 20.7 inches and our load range B option has an outer diameter of 20.5 inches. I have attached links to our 5.30-12 and our 4.80-12 tires for you to check out. When choosing tires, you will also want to keep in mind that a 5.30-12 tire will be wider than a...
    view full answer...
  • Comparing Radial and Bias Trailer Tire Options for a 2008 Jayco Pop-up Camper
    There are several differences between radial and bias trailer tires. A radial tire is going to track better and the overall ride quality will be better as well. For a pop-up camper, I would go with radial tires. The radial size you would need is the 145/80-12 that you have referenced, the Kenda Karrier S-Trail Radial Trailer Tire, # AM10130. This tire is rated for 1,220 pounds at 65 pis. You should always inflate trailer tires to their maximum psi rating as indicated on the tire for best...
    view full answer...
  • Is there a Radial Trailer Tire Available in Size 5.30-12
    We do not carry a radial trailer tire in 5.30-12 size but there is another option. You can also use a 145/80-12. Both tires will fit on a 4 inch wide rim and can have similar weight capacities. The one size difference is that the 145/80-12 is 0.6 inches shorter than a 5.30-12. For a radial that is 145/80-12, I recommend # AM10130 that you have referenced. This is a radial tire that is rated for 1,220 pounds at 65 psi. According to my contact at Kenda, the people who would benefit most...
    view full answer...
  • Size Difference Between the Kenda Karrier ST145/R12 Radial Tire # AM10130 and a 4.80-12 Trailer Tire
    The Kenda Karrier ST145/R12 Radial Tire, # AM10130, is approximately 1/2 inch larger in diameter and 1 inch wider than a 4.80-12 trailer tire. The main things to consider when moving to a larger tire size is wheel well clearance and weight capacity. The weight capacity should not be an issue since this is a load range D tire with a maximum load rating of 1,220 lbs at 65 psi. The wheel well clearance is what you will want to look at. This tire will sit approximately 1/4 inch closer to...
    view full answer...
  • Which Trailer Tire Size Will Replace 155-12 Tires on a Baxley Motorcycle Trailer
    A 155 is not a common trailer tire size. The closest match is going to be either a 145/80-12 or a 5.30-12 like you mentioned. A 155 is going to be about 6.1 inches wide. A 145 will be 5.7 and a 5.30 will be 5.6 inches wide. The overall diameter of a 155 depends on the aspect ratio, the second number in the size, so a 145/80-12 has an aspect ratio of 80 percent. This means the overall diameter is 21.3 inches. On a 5.30 the overall diameter is 21.9 inches If it were me, I would go with...
    view full answer...
  • Difference Between Trailer Tires And Automobile Tires
    The main difference between a trailer tire like the Kenda Karrier S-Trail Radial Trailer Tire, part # AM10130, and an automobile tire is that a trailer tire will have a thicker sidewall which is designed for increased load capacity on a trailer. Trailer tires are identified with ST, like ST145/R12. Automobile tires are designed more for ride, comfort and handling. If you placed tires designed for trailers on an automobile, the ride would be very stiff and uncomfortable, and is not recommended....
    view full answer...
  • Best Trailer Tire Recommendation for a 12 Inch Rim
    The difference between the two trailer sizes you referenced is that the 5.30-12 will be about 1-1/2 inches taller than the 4.80-12 and would have more capacity. As long as your trailer has the clearance for a slightly taller and wider tire a 5.30-12 would be a great option. However, either would have enough capacity and wouldn't offer a significant ride quality improvement over the other. All things being equal I would go with the larger tire as it will spin slower at the same speed as...
    view full answer...
  • Recommended Radial Tires To Replace Bias-Ply Tires On Jet Ski Trailer
    We do not carry the brand tires you said you have on your jet ski trailer so I cannot provide much information about their performance. We do have radial tires that would work for your trailer if that is the way you want to go. You can expect a smoother ride if you would replace your bias-ply tires with radials. I recommend the Kenda Karrier S-Trail ST145/R12 # AM10130. This is an 8-ply Load Range D tire that has a load capacity of 1,220 lbs at 65 psi. This tire is about 3/4 inches wider...
    view full answer...
  • Availablity of Replacement Trailer Tire in 6.90-12
    We don't have a tire in that exact size. We have ones that are close but not quite as wide. They would be about an inch skinnier like the part # AM10130. As long as you have a 12 inch diameter trailer wheel that is 4 inches wide this would work well.
    view full answer...
  • Converting Tire Size For Bias-Ply Tire To Metric
    The number 5.30 on your tire is the section width of the tire which means the tire is 5.3 inches wide. For a comparable radial tire for your boat trailer you can use a tire like part # AM10130. This tire measures 5.7-inches wide. The # AM10130 tire is what I recommend if you switch to a radial tire for your boat trailer. You can calculate the size of the tire width by multiplying the first number of a radial tire by .03937. In this case, the # AM10130 is and ST145/R12. Multiply (145 x...
    view full answer...
  • Recommended Replacement 145R12 Trailer Tires
    For a tire to replace the 145/R12 size tires currently on your trailer, I recommend the Kenda Karrier S-Trail Radial Trailer Tire # AM10130. This is a great radial trailer tire that has a 1,220 pound maximum load at 65 psi. Note that this is a Load Range D tire instead of the C rating you referenced in your question. While this particular tire may have a higher load capacity than what you are replacing, you will still be limited to the lowest rated component on your trailer. If you are...
    view full answer...
  • Will 5.30-12 Tires Fit On The Same Size Wheels As The 4.80-12 Tires?
    Yes. A 4.80-12 tire and a 5.30-12 tire will both use a 12x4 inch wheel. For your tires, I recommend the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D # AM10130. This is the only radial tire we carry in this size and it has a rated load capacity of 1,220 lbs. Radial tires hold up to highway traffic better than bias tires due to the belts running 90 degrees to the tread instead of the diagonal belts of the bias tires. It has an 8 ply rating and is 5.7 inches wide...
    view full answer...
  • Do Radial Tires Ride Smoother Than Bias Ply Tires
    Both tires will have similar PSI ratings, but a radial tire like the part # AM10130 will flex more than a bias ply 4.80-12 tire so it would be a somewhat smoother ride. Also the tire will be slightly larger so that also will help reduce bumpiness.
    view full answer...
  • Will Radial Tire in Size of 145/80-12 Replace a 5.30-12 Tire Size
    Yes, the 145/80-12 tire size will fit the same 12 inch rim diameter that your 5.30-12 tires currently fit. For a radial in the size you are looking for the part # AM10130 is our most popular option. I attached a review video for this tire as well.
    view full answer...
  • Replacement Trailer Tire Recommendation to Replace 145/80-12
    It would be too small diameter-wise to replace a 145/80/12 with a 4.80-12. Instead you would need the part # AM10140 for just a tire in the correct size that would work well for you.
    view full answer...
  • Can ST145R12 Tires Fit Rims On Teske Trailer With 4.80-12 Tires
    The radial tire I recommend for your trailer is the Kenda Karrier S-Trail Radial Trailer Tire, part # AM10130. This tire will work just fine on the wheel you have for your 4.80/12 tire right now. This is a Load Range D tire with an 8-ply rating and has a maximum load rating of 1,220-lbs at 65 psi. This is designed to fit 12 x 4-inch rims.
    view full answer...
  • Are the Kenda ST145/12 Trailer Tires Tubeless
    Pretty much all trailer tires, including # AM10130, are tubeless nowadays. You generally don't see tube tires outside of the agricultural industry any more.
    view full answer...

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