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

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

Part Number: AM10140
In Stock
$80.32
Retail:$160.99
You Save: 50%
Trailer Tires and Wheels
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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. Great Prices for the best trailer 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 1-800-940-8924 for expert service.
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  • Reviews (522)
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Kenda Trailer Tires and Wheels - AM10140

  • 12 Inch
  • Tire Only
  • 145/80-12
  • Load Range E
  • Radial Tire
  • M - 81 mph
  • 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: 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.



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





Customer Satisfaction Score:

Ratings & Reviews

4.9

522 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.

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

  • 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...
  • Comparing Trailer Wheel and Tires in Size ST145/R12
    The Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E # AM10140 and the Aluminum Lynx Trailer Wheel - 12" x 4" Rim - 5 on 4-1/2 - Silver # LH45FR is the wheel and tire that you want. There is very little difference between the two except for Load Range. I would choose the higher load range. These do not come mounted, so you can have them mounted at a local shop when they arrive.
    view full answer...
  • Recommended Tires for Pontoon Boat Trailer and Speeds Around 75 MPH
    For your pontoon boat trailer, I recommend moving to a larger tire so that you can get the speed rating you need. I would only move up one size, so you don't go too far with adding height to your trailer. I recommend the Taskmaster 5.30-12 Bias Trailer Tire with 12" White Spoke Wheel - 5 on 4-1/2 - Load Range C # TA76RR which are rated for up to 1,045 lbs at 80 psi and have a speed rating of 81 mph max. You will want to be aware of the overall dimensions of the tire so you can make...
    view full answer...
  • Replacement ST145R12 Tire and Wheel for Acme Tow Dolly
    Any trailer or tow dolly tire should always be inflated to the maximum psi pressure shown on the tire sidewall. It is never appropriate to under- or over-inflate a trailer/dolly tire since only when fully inflated can the tire deliver its rated weight capacity. Naturally it is also important that the vehicle loaded on the dolly be within the dolly's rated capacity. Acme offers several different dolly products and these are specified to use Load Range E tires in size ST145R12. Their wheels...
    view full answer...
  • How to Get the Most Out of Your Trailer Tires
    We have just what you are looking for. Although we do have load range D tires in the 5.30-12 size they are bias as opposed to radial in style. Bias tires are meant more for off-road purposes like agriculture whereas the radial tires have a sidewall with more flex that can better dissipate the heat build-up than bias can. I recommend going with the Taskmaster 5.30R12 Radial Trailer Tire # TT53012C. It has a load range of C (Maximum load: 1,050 lbs at 80 psi), a max speed rating of 81 mph,...
    view full answer...
  • How to Switch to Radial Trailer Tires From 205/65-10 Bias Trailer Tires
    Hi Dan, You're right that radial trailer tires are a much, much better option for highway driving than bias tires because radials run cooler. This means they flex more for better traction and less chance of a blowout on long trips. And you can switch from 205/65-10 bias tires to radials, but you'll need a different size tire and new wheels because there aren't 205/65-10 radials. A 205/65-10 measures 20.5" in diameter and 8.1" wide, and a close option is a ST145/R12 tire which is 5.7"...
    view full answer...
  • Radial Trailer Tire to Replace Bias Ply 4.80-12 Trailer Tires
    The closest radial tire size we offer to your 4.80-12 bias ply trailer tire would be the Karrier S-Trail ST145/R12 Radial Trailer Tire # AM10140. This tire will be about an inch taller and wider than what you currently have. You will need to make sure your trailer has enough clearance for this. I attached a couple FAQ articles on trailer tires for you to check out as well.
    view full answer...
  • Trailer Tire Recommendation for Replacing Size ST14512
    For a 12 inch trailer wheel I would recommend the Taskmaster 4.80R12 Radial Trailer Tire part # TT48012C as it has a higher speed rating of 81 mph which is great for highway use and has plenty of weight capacity at 990 lbs per tire. It would only be slightly smaller in diameter than the size you have now but fits the same wheel.
    view full answer...
  • Aluminum HWT Wheel Compatibility With Timbren Axle-Less Trailer Suspension System With Hubs
    The Timbren Axle-Less Trailer Suspension System with Hubs - 5 on 4-1/2 - Off-Road Tires - 1,200 lbs # A12WS545 is compatible with the Aluminum HWT Series S5 Split Spoke Trailer Wheel - 12" x 4" Rim - 5 on 4-1/2 # AM22319HWT. With these wheels you most likely want valve stems # AM20903. For tires, I recommend the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range D # AM10130. You may also be interested in the Trailer Wheel Center Cap, 3.19" Pilot Size # 319EZ for that...
    view full answer...
  • Will Switching to Bigger Wheels On a Tow Dolly Limit the Amount of Blowouts
    If I'm looking at the right thing, then the reason you're having so many blow outs is because you're overloading the dolly. It looks like the tires you have right now are likely something like the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire # AM10140 which has a max weight capacity of 1,520 lbs (x2 = 3,040), so you'd be overloading the dolly by around 2,000 lbs (according to Google). Using a 15" wheel will definitely give you more capacity, around 600 more lbs, but still won't...
    view full answer...
  • What is the Difference Between the Load Range D and E for the Tire Size ST145R12
    Load range D has a capacity of 1,220 lbs at 65 psi, whereas load range E has a capacity of 1,520 lbs at 80 psi. Basically the only difference between the two is the weight capacity. With trailer tires you always want to have them inflated to their maximum that way you get the best handling, braking and wear characteristics. You should note that if you increase the load capacity of your tires it will not necessarily increase the overall capacity of your setup. You must always go with the...
    view full answer...
  • Will Higher Load Range Tires on 2017 Coachmen Clipper Be Beneficial
    You can definitely replace the load range D tires on your 2012 Coachmen Clipper with the Kenda Karrier S-Trail ST145/R12 # AM10140. The higher load range will result in the tire lasting longer so there is a benefit. The load range E tires have a higher ply rating so they're a bit stronger and will run a little cooler increasing the life of the tire.
    view full answer...
  • What PSI Should I Run My ST145/R12 Trailer Tire At?
    This is a question we get pretty frequently as there is definitely some opposing ideas and incorrect information out there in the world of the interwebs. That said, unless otherwise stated by the tire manufacturer*, you always want to run your tires at the max PSI listed on the sidewall of said tire. This is what the manufacturer did all the testing at and will be what all the ratings are listed for. The Kenda Karrier S-Trail ST145/R12 # AM10140, as an example, is rated up to 80 PSI. This...
    view full answer...
  • Upgrading to Larger Tires for Off-Road Use on a Coachmen Popup Camper
    Thanks for the picture! There is going to be a noticeable benefit to having larger tires on dirt roads that are poorly maintained. The larger tires will give you a wider footprint by almost 30% which translates to more stability and grip. The Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E item # AM10140 is 5.71 inches wide the Kenda Karrier ST205/75R14 Radial Trailer Tire w/ 14" White Spoke Wheel - 5 on 4-1/2 - Load Range D item # AM32161 you were looking at are 8.07...
    view full answer...
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  • Upgraded Radial Trailer Tire and Aluminum Wheel for Triton LTWCI PWC Trailer
    If the Kenda Karrier S-Trail ST145/R12 Radial Tire # AM10140 and the 12" Aluminum Wheel # LH45FR with 5 on 4-1/2" bolt pattern matches up with what you have now, then it will be a direct fit replacement. If it does not, then you will need to measure to determine if you have room. The above measures 21.3" diameter x 5.7" wide. The existing lug nuts can be reused.
    view full answer...
  • Replacement Tires for 2011 Jayco Jay Sport 8
    Typically when it comes to replacing a trailer tire I recommend sticking with the same size. Although I do not know the weight capacity of your current tires, we do have the Taskmaster 5.30R12 Radial Trailer Tire - Load Range C # TT53012C. This radial tire has a maximum load of 1,050 lbs at 80 psi with a max speed of 81 mph. It looks like your trailer has a GVWR of 1,995 lbs so these tires will handle that without any issues. Because of the tire size, it is also possible to go to a 145/80-12...
    view full answer...
  • Will Trailer Tire Size 145/80-12 Replace 4.80-12
    The tire size 145/80-12 does fit on the same rim size as what your 4.80-12 fits on. For that we have the # AM10140 which is a radial trailer tire size. This would basically be just .8 inches taller overall so it would fit and work well.
    view full answer...
  • Recommended 145R12 LR E Tire For Aluminum HWT Series S5 12 x 4 Wheel AM22319HWT
    I do have an option for you, but they will not come premounted with a tire. You will need the Aluminum HWT Series S5 Split Spoke Trailer Wheel - 12" x 4" Rim - 5 on 4-1/2 - Silver # AM22319HWT which is the wheel that you like, and then for a 145R12 Load Range E tire you will need the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E # AM10140. Both the wheel and tire have a 1520lb load rating so when combined you will be able to fully utilize the 1520lb load capacity...
    view full answer...
  • WillI I Notice a Difference if I Replace 145/80-12 Sized Tires with 205/65-10 Sized Tires
    You likely aren't going to notice any difference at all. A 145/R12 tire, like part # AM10140, is around 21.3 inches in diameter and a 20.5x8-10, or a 205/65-10 to use the current sizing, around 20.5 inches. So your current tires are less than an inch taller which isn't going to make enough of an impact on your wind resistance. With that being said, if you do replace your current tires with the smaller size, like our part # AM3H490, you will have a wider tire by about 2.5 inches or so....
    view full answer...
  • ST145/80-12 Tire Recommendation Over a 4.80-12
    The two tire sizes are similar, but the 145/80-12 will be a bit taller at 21.3 inches vs. the 4.80-12 which has a diameter of 20.5 inches. Aside from that they are very similar and both fit 12 inch diameter rims that are 4 inches wide. The radial part # AM10140 that is a ST145/80R12 would be what I recommend as it would have plenty of capacity and is a radial which is preferred over bias-ply construction like what all of the 4.80-12 tires are made of. A radial tire flexes more than a...
    view full answer...
  • Should I Replace The ST145/R12 Trailer Tires Before Taking a 1,000 Mile Trip
    If you are questioning the quality of the tires or their ability to hold up I recommend just replacing the tires. Defiantly be sure to check the age of the tires to ensure they are not too old. I typically recommend once a tire is 5 years old to go ahead and replace them. We have the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire in a Load Range D # AM10130 or E # AM10140.
    view full answer...
  • 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...
  • 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...
  • Can 4.80-12 Tires be Replaced with ST175/80R13 Tires and Wheels on Trailer
    Switching from a 4.80-12 size tire to an ST175/80R13 is quite a decent jump in size but it really just depends on how much room you currently have available both between the top of the tires and fender and between the side of the tire and trailer frame as to if you can safely make the change. An ST17580R13 tire will be about 3-1/2 inches larger in diameter/height and 2 inches larger in width than what you have right now. Keep in mind too that only half of these differences (1-3/4 inches...
    view full answer...


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