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This tire-and-wheel assembly is made for real road miles. The Karrier S-Trail radial tire is Load Range D with an 8-ply rating and a maximum load of 1,220 lbs at 65 psi. It’s matched to a 12" x 4" aluminum wheel rated for 1,520 lbs, so both parts are built to handle steady highway speeds up to 81 mph (speed rating M). The setup meets DOT specifications for confidence when the miles stack up.
Moisture and road grime don’t stand a chance here. The gunmetal AM02 series aluminum wheel is rustproof and protected with a clear coat on both sides. That finish keeps it looking sharp while warding off scuffs, scratches, and corrosion — even after long stretches in harsh weather. Steel inserts in the lug nut wells add strength where it counts, preventing wear around the holes and keeping the wheel snug on the hub.
The Karrier S-Trail radial tire uses double steel belts and full nylon plies to keep traction consistent mile after mile. Its computer-generated tread design and premium rubber materials deliver stable handling and dependable grip in wet or dry conditions. The result is a balanced, smooth feel on the road that holds up under real towing loads.
This is a true tire-and-wheel assembly that’s built to go straight to work. The aluminum wheel’s 5 on 4-1/2 bolt pattern, 0 offset, and 3.19" pilot diameter make it straightforward to mount. And with Kenda’s 1-Year Worry-Free Guarantee, if the tire is damaged within the first 12 months, it’s replaced at no charge — simple protection that backs up a road-ready setup.
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.
Hello, everybody. This is Jeff at etrailer.com. Today we're gonna take a look at the Kenda Karrier ST145R12 S-Trail radial trailer tire in a load range D, and it's mounted on the 12 inch, gun metal aluminum trailer wheel, with a 5 on 4 1/2 inch bolt pattern. Now, this tire and wheel assembly is ideal for stock trailers, utility trailers, and even campers. The wheel, you can see, is a nice gun metal 5-spoke aluminum AM02 series wheel. As you notice, has a machine face and a lip, and it's durable, lightweight, rust proof.
If you notice, the front has a clear coat finish on it and the back even has a clear coat, protects the wheel from any scuffs or scratches. The nice feature I like on this wheel is the steel inserts right here in the lug nut wells. These are designed to help keep your wheel securely in place on your trailer hub. Basically, when you go to install this wheel and you put your lug nuts in there and torque 'em down, these steel inserts prevent holes from wearing down or elongating, eliminates the need for a constant retightening of your lug nuts. Now the wheel itself, the diameter is 12 inches.
The width on just the wheel is four inches wide. This wheel does have a bolt pattern of 5 on 4 1/2 inches. And if you want to measure that on a wheel that's an odd number of lugs, like in this case, five, what you'll do is pick any hole, let's say this one, and then you're gonna measure across to either one of these holes. But the trick is you measure from the center of the starting hole to the furthest edge of whichever hole you measure to. On this one, it'll measure 4 1/2 inches.
So that's telling you this is a five-lug 4 1/2 inch bolt pattern. Does use a wheel lug size of 1/2 inch by 20. And the weight capacity on just the wheel is 1,520 pounds. Now if you notice this wheel does not have a center cap. We do sell those separately, if you do want one.
You do wanna make sure to get a center cap that'll have the same diameter of the pilot hole right here, which is 3.19 inches. Now this tire that's mounted on it, it is a Kenda Karrier S-Trail radial tire, uses double steel belts, full nylon plies, which combine for superior function and long life. And if you look at the tread on this, it is a computer-generated tread design. And they use premium rubber compound materials that'll give you superior traction on wet or dry conditions. The tire is an ST tire, which means special trailer tire, so it does have the sturdy sidewall so they could handle heavy loads, and it is created specifically for trailers, not intended for use on other vehicles. The tire size which will be stamped on the sidewall, ST again for special trailer, 145R12, R means it's a radial. Section width, 5.8 inches. Overall diameter from the bottom to the top when it's inflated, it's 21.4. And this tire is a load range D, which means it's an eight-ply rated tire. So it does have a maximum load capacity of 1,220 pounds at 65 PSI. And one of the last things I wanna mention to you is they do do a speed rating now on these trailer tires, and it is stamped on the sidewall, but it is a letter designation. And the way you'll find that is right down here where the tire size is listed. Right after it, you'll see a number for the load index, and then you'll see the letter M stamped there. Speed rating M means it's an 81 mile per hour speed rating. Now this tower wheel assembly does meet the Department of Transportation specifications. But that's gonna do it for a look at the Kenda Karrier ST145R12 S-Trail radial trailer tire in a mode range D on this 12 inch gun metal aluminum trailer wheel.
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!
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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!!