Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
When you’re clocking serious miles, this Kenda Karrier S-Trail combo is ready to roll. The ST145R12 radial tire holds a Load Range D, 8-ply rating with a maximum load of 1,220 lbs at 65 psi. The M speed rating (81 mph) means it’s built for highway use without heat worries. The double steel belts and full nylon plies give it the backbone for long runs under heavy loads, all while meeting DOT specs for safe, dependable travel.
Moisture and salt can eat up a wheel fast, but not this one. The 12" x 4" aluminum AM02 wheel is lightweight, durable, and completely rustproof. Its split-spoke design features a machined face with a clear coat finish on both sides to protect against scuffs and corrosion. It looks sharp right out of the box and stays that way season after season.
The Karrier S-Trail tread is designed by computer to deliver solid grip whether the road is dry or slick. Premium rubber compounds help the tire wear evenly and maintain traction over time. Combined with its radial construction, you get a smoother ride that tracks straight and stable mile after mile.
This assembly is balanced with the right strength where it counts. The wheel itself is rated at 1,520 lbs while the tire carries 1,220 lbs at full pressure. A 5 on 4-1/2" bolt pattern, 0 offset, and 3.19" pilot diameter make for straightforward mounting with standard 1/2"-20 bolts. Everything works together to deliver steady performance under load without compromise.
The Kenda S-Trail setup includes a 1-year worry-free guarantee—if the tire is damaged within the first year, it’s replaced at no charge. That kind of coverage adds confidence when you’re running new gear and want to know you’re backed up 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.
Hello everybody, this is Jeff at etrailer.com. Today, we're gonna take a look at this Kenda Karrier ST 145R12 S-Trail radial trailer tire in a load range D and it's mounted on this 12 inch black aluminum trailer wheel with the 5 on 4-1/2 inch bolt pattern. Now, this tire and wheel assembly is ideal for stock trailers, utility trailers, and campers. The wheel is an aluminum wheel. It's durable, lightweight, and rustproof. And the design is the Americana AM02 series, which you can see is a split five-spoke design.
It has a nice black finish to it. And then they do a machine finish on the face of the spokes and even on the lip which gives a nice shine to the wheel. They do use a clear coat finish on both the front and even on the back of the wheel. It protects it from scuffs and scratches. Now, one of the nice features I like on this wheel is the steel inserts.
These steel inserts are pressed into the lug nut wells. They're designed to help keep your wheel securely in place in your trailer hub. Basically when you put this up onto your hub, your studs will come through the holes, put your lugs on, torque your lugs down. Those inserts prevent those holes from elongating and wearing down over time. So it eliminates the need for constant re-tightening of your lug nuts.
A few dimensions on the wheel itself, the diameter is 12 inches. Width on just the wheel is four inches wide. Now, the wheel does have a 5 on 4-1/2 inch bolt pattern. And if you want to measure that bolt pattern on a wheel that's an odd number of lugs like this one, what you'll want to do is just pick any one of the holes, 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.
So on this one, if we measured it, it's 4-1/2 inches. So it's 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 the center cap is not included. If you do want a center cap, we do sell those separately on our website. You do want to get a center cap that'll match the diameter of this pilot hole 'cause when you install your center cap, it'll go through this hole. The diameter of the hole here is 3.19 inches. Now, the tire on this is a Kenda Karrier S-Trail radial tire, offers double steel belts, full nylon ply, combine for a nice superior function and long life. And if you look at the tread design, it's a computer-generated tread design and also offers premium rubber compound materials to give you superior traction in wet or dry conditions. As we mentioned, the tire is an ST, which stands for Special Trailer Tire, has the sturdy sidewall so they can handle heavy loads and it is created specifically for trailers. It's not intended for use in any other vehicles. The tire size, which will be stamped on the sidewall, let's see if we can find it right here. Yeah, there it is right around the wheel, ST for Special Trailer 145R12. The R means it's a radial. The section width on the tire 5.8 inches. Overall height from the bottom to the top when it's inflated is 21.4. This tire is a load range D, which means it's a eight-ply rated tire. Has a maximum load of 1,220 pounds at 65 PSI. And it does come with a speed rating and that is also stamped on the sidewall and it's usually right after the tire size we went over. You'll see a number for the load index and then you'll see the letter M. Speed rating M will mean it's an 81 mile per hour speed rated tire. And this whole tire and wheel assembly does meet the DOT Department of Transportation specifications. But that should do it for a look at the Kenda Karrier ST 145R12 radial trailer tire in a load range D on this 12 inch black aluminum trailer wheel.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
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.
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.
Great quality, delivered on time, perfe ct!
Excellent customer service. The Rep was extremely helpful. They always have what I am looking for. Great!
Great product! Great customer service! Fit my kayak trailer perfectly!
Exactly what i wanted, direct replacement for the bias ply tires that were on the boat trailer. Shipping was fast, product arrived undamaged. Only gripe was the tire stickers being placed on the front sidewall. When trying to remove left half the sticker there, was a pain to get it all off. put the sticker on the tread of the tire.
Tires and wheels were a perfect fit!
They look great!
GREAT customer service----very happy ---will order again and again.
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 !!
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.
Do you have a question about this Trailer Tires and Wheel?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Lazer S.
5/13/2026
Glad we had what you were looking for, Clint! Sorry about the sticker though. I will mention it to our shipping team so they can get that addressed. Having it on the tread is definitely a better idea. What kind of boat are you carrying?