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When you’re hauling serious weight mile after mile, this tire and wheel assembly is made to handle it. The Karrier S-Trail radial tire carries a Load Range E rating with a 10-ply construction and a 1,520-lb maximum load at 80 psi. With its M-speed rating (81 mph) and DOT compliance, it’s designed to stay cool and steady on long stretches of highway or in hot conditions without giving up traction or confidence.
Saltwater, rain, and road grime can ruin a lesser wheel fast. The AM02 series aluminum wheel resists rust completely thanks to its lightweight, rustproof construction and clear coat on both front and back. The machined-face split-spoke design looks sharp while the finish protects against scuffs and scratches, so the wheel keeps its clean look through seasons of use.
Loose lug nuts aren’t just annoying—they can wear out your wheel over time. Kenda solves that with steel inserts built right into the lug nut wells. They keep the wheel securely seated on the hub and stop the holes from wearing down, which means less retightening and more peace of mind for every trip.
A good tow feels solid and predictable, not bouncy or harsh. The Karrier S-Trail radial uses double steel belts and full nylon piles for strength, stability, and long life. Its computer-generated tread pattern and premium rubber compound deliver solid traction in both wet and dry conditions, keeping your trailer tracking straight behind you no matter what the road throws at it.
Everything here is built to standard dimensions for easy setup: a 12" diameter x 4" wide rim with a 5 on 4-1/2 bolt pattern, 0 offset, 3.19" pilot diameter, and 1/2"-20 wheel bolts. Tire size is ST145R12 with a 5.8" section width and 21.4" outer diameter when inflated. The assembly meets DOT specifications and includes a 2-year limited warranty on the wheel plus a 1-year worry-free guarantee on the tire—coverage that backs up its durability from day one.
1. Count the lug holes
Look at the wheel hub or the back of the wheel and count how many lug holes there are(also called bolt holes).
Common configurations include: 4-lug, 5-lug, 6-lug and 8 lug
2a. For even lug counts (4-lug, 6-lug, 8-lug)
Measure from the center of one lug hole directly across to the center of the hole opposite it.
Common configurations: 4 on 4", 6 on 5.5", 8 on 6.5"
2b. For odd lug counts (5-lug)
Measure from the center of one lug hole to the outer edge of the hole directly across (not center-to-center since there's no directly opposite hole).
Common configurations: 5 on 4.5" (most popular), 5 on 5", 5 on 4.75", 5 on 5.5"
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com. Let's take a real quick look at this Kenda Karrier ST145/R12 load range E S-trail radial trailer tire with this 12-inch aluminium wheel. This tire and wheel assembly is ideal for your trailer. This special trailer tire, or ST-tire is designed just for trailers and it does feature double steel belts and full nylon plies for superior function and long life. The computer-generated tread design that you see here and premium rubber compound materials are gonna give you superior traction in wet or dry conditions. And as I mentioned and as we have stamped here on our tire, this is an ST145/R12.
The section width is 5.8 inches and then the outer diameter when fully inflated is 21.4 inches. This is a load range E tire, meaning it has a 10-ply rating. The maximum load is 1,520 pounds at 80 PSI. And this has a speed rating of M, indicating the maximum speed of 81 miles per hour. Now, this wheel here, this is a gun metal aluminium, AM02 series wheel.
So it's durable, it's lightweight, it's rustproof. It can be used for trailers that are around water quite a bit. This features a clear coat finish on the front and on the back that's gonna protect it from scuffs and scratches. This features a split spoke design with a machine face, so it's a very attractive tire and wheel assembly. And this also features steel inserts in the lug nut wells that are gonna help keep the wheel securely in place on your trailer hub, preventing the holes from wearing down, and eliminating the need for you to constantly re-tighten the lug nuts.
Now, the dimensions of our wheel, measuring the diameter first, measuring bead seat to bead seat, and that's where the tire actually meets the wheel, it's gonna be 12 inches in diameter. And then the width of our wheel is four inches. And then the bolt pattern is 5 on 4.5 inches. And in case you don't know, the first number in the bolt pattern is the number of bolt holes, but the second number is the diameter in inches of the circle on which the bolt holes sit. So to determine the bolt circle diameter on wheels with an odd number of bolt holes as we have here, you simply measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first.
The wheel capacity is 1,520 pounds. The wheel stud size is 1/2 an inch by 20. The center cap is sold separately. But if you decide to pick one up, you just wanna make sure that it fits a pilot diameter of 3.19 inches. And this tire and wheel assembly does meet the Department of Transportation specifications. Well, I think that's gonna wrap up our real quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Gwendolyn Y.
5/12/2026
The new rims look awesome on your trailer! Thanks for sharing the photo!
Lazer S.
7/28/2026
They definitely look good on there, Jeff! ^___^ Are you pulling this behind a motorcycle?
Mike L.
9/11/2026
They look great Paul, thanks for the photo!!
Gwendolyn Y.
5/4/2026
That's a sweet boat you got, Samuel! Now you're ready to get on the water and enjoy the sun!
Robert
7/3/2026
Product is great and its a much safer feeling having the load range D tires and 81mph speed rating vs the original B range and only 65mph speed rating!
Do you have a question about this Trailer Tires and Wheel?
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Mike L.
7/14/2026
Those look fantastic, Alex! I installed aluminum wheels on my PWC trailer several years back, and it makes a huge difference!!