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
No problems at all. It did come in a day later than promised, but I'm not sure how they were going to get it to me that fast anyway. Still super fast delivery without issues.
They look great out of the box. Now all I need is snow to head north with the trailer.
Replaced 2 year old tires. Perfect fit and made the trailer ride so much smoother. It was a VERY noticeable improvement and now I can travel at highway speed. Great look too!
Wheels look great, appear to be good quality, and were delivered fast and packaged well! Definitely a nice upgrade to our camper.
The only thing I would recommend is that you determine if the lug nuts and wrench you are currently using will work with this wheel. The lugs that were used on my old set are a typical (shallow) lug nut. The lug hole openings on these wheels are fairly narrow and my lug wrench was too large for the opening.
I ended up using a ‘DORMAN Spline-Drive Wheel Lock Kit’ (711-255) that had a very narrow ‘key’ socket and fairly long chrome lugs. The ‘key’ socket slips over the lug and then you can use your lug wrench. Just be sure to keep everything lined up and you torque the lugs with equal and straight alignment. I’ve heard the ‘key’ could be sheared if not used properly. That said, this worked very well for my setup and the key seemed like it was good quality as well. I’ll just need to make sure the ‘key’ socket stays in the camper with the lug wrench. If not, you’re kind of stuck.
And, the wheels ended up looking great with the chrome lugs! I added a few photos that may help with the lug nut scenario.
Finally put wheels and tires on trailer. They look great. The wheels are a very close match to the ones on my truck. Now the wait and see on the wear and tear on the Kenda radial tires.
Very easy to order on the webist- Perfect communication and updates for when my gear would arrive. Wheels and tires were packed very well so no scratches could occur. These will go on a snowmobile trailer to give it some flare.
Delivery was fast and free! The tires and wheels look great
Great looking rims and tires, arrived quickly and all ready to mount.
Great product ar a fair price and lightening fast free shipping. Ordered on a Wednesday morning, tires and wheels here Thursday afternoon.
Great sets, and super customer serve!
I always use etrailers when needing trailer products.
Knowledgeable staff, fast shipping, great quality products and follow up customer service and support.What’s better than that? No risk purchase, these guys are professionals.Thanks again, my trailer looks great !!
Tires were the perfect. Cannot say enough good things about Carter, he was such a huge help in getting the correct tire. Will definitely come back to Etrailer for my trailer needs. Thank you.
Quality look and feel. Replaced 4.80x12 bias with 145 R12’s. Glad I did and they look great on the jet ski trailer.
Right out of the box, mark me impressed. These really made my Sea-Doo trailer look finished. They are not much more than the steel spoke wheels with the same tires.
Initially I had purchased two new tire & wheels for my kayak trailer and was so impressed that I purchased another one for the spare. Professional service and expedited shipping. Pleased with my purchases !! Thanks again.
Super easy to work with etrailer and find the right tire for our tow dolly. Great communication and updates throughout.
Outstanding customer service. My original order wasn’t in stock. I called Carter P recommended these wheels and tires. The package was sent out immediately and received 2 days early. The wheels look great. I drove over 400 miles on them so far and they’ve preformed great. Very pleased with this purchase. Thank you Carter and etrailer for a wonderful experience.
Perfect fit! Look great! Made my boat trailer look and ride so much better. Highly recommended for the price!
As always the documentation of products is excellent, both written and video. Ordering is extremely simple and shipping was quick and on time. The packaging was robust but easy to handle and of course I received exactly what I expected. I did want to confirm the proper lug nut torque and I received an answer via a chat session within minutes. Etrailer has an "A" game that always executes when I shop and order.
Items came as described and in excellent condition. And the wheels look great on my trailer. Very happy with purchase!!
Nice wheels and tire upgrade. I really needed radials but the wheels look so nice and give my trailer a more refined look. Gona order one more for spare
Wheels look great on my trailer. I placed the order over the phone. The lady was super helpful sending me links to the pictures and choosing the right tire size and model. I think this is a great upgrade to my trailer.
Makes our camper look great
Kaitlyn was patient and very helpful! The tires and rims are perfect!
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