Radial tire with automotive-grade tread has a 10-ply rating and a 1,520-lb max load at 80 psi. 12" x 4" Aluminum wheel has a 5 on 4-1/2 bolt pattern and a star spoke pattern. Improved clamp force technology ensures the wheel stays in place.
Features:
Specs:
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.
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 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.
Determining the Bolt Pattern
The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.
To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: "5 on 4-1/2" means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)
On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: "8 on 6-1/2" means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)
Measuring the distance from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we'll be reviewing part number AM31215. This is the Kenda ST145R12 radial trailer tire with a 12" aluminum wheel. The special trailer tire design is going to couple the strength of a bias tire with the durability and stability of a radial tire. It is created specifically for trailers, so it's not intended for use on other types of vehicles. It's going to feature the double steel belts and full nylon plys that are going to combine for superior function and long life. It's also going to feature the computer-generated tread design and premium rubber compound materials that are going to offer superior traction in wet or dry conditions. The aluminum wheel is by Americana.
It's going to be very durable and rust-proof, featuring an attractive star spoke pattern. The tire and wheel assembly meets Department of Transportation specifications. Now when it comes to the rim dimensions it's going to give us a diameter of 12", with a width of 4". The bolt pattern's going to be 5 on 4-1/2 so that means that we're going to have 5 bolt holes. The distance measuring from the center of one bolt hole directly across to the area between the two bolt holes on the other side at a straight line measurement is going to measure 4-1/2", so 5 on 4-1/2".
The lug size is 1/2". The pilot diameter is going to measure 3.19". That's measuring the diameter of the larger hole here at the center of the wheel. Now the wheel's going to offer a capacity of 1,520 pounds. The tire size is ST145R12. It's going to give us a section width from edge to edge of 5.7" and an outer diameter of edge to edge right at 21.3".
It's going to feature a load range of E with a 10-ply rating. Maximum load of the tire is 1,520 pounds at 80 psi. It does have a maximum speed rating of 65 miles per hour. It's going to feature all the indicators listed here on the outer wall of the tire. That way you can always use that as a quick reference guide if you ever need any of that information. That's going to do it for today's review of part number AM31215.
This is the Kenda radial trailer tire with a 12" aluminum wheel. .
Average Customer Rating: 4.9 out of 5 stars (255 Customer Reviews)
Radial tire with automotive-grade tread has a 10-ply rating and a 1,520-lb max load at 80 psi. 12" x 4" Aluminum wheel has a 5 on 4-1/2 bolt pattern and a star spoke pattern. Improved clamp force technology ensures the wheel stays in place.
Great tire and rims look good too. Use them for mostly short local fishing trips but used them a 1,000 mile round trip to Canada this past summer. Much better and smoother ride than the factory bias ply tires. Looking for something reliable give these a shot. Spend a little extra money you won't be disappointed. Picture is right after installation 356573
Wanted to let you know the tires arrived today. They look great. The only issue is that the holes around the lug nuts are not large enough to allow a 13/16 impact socket to pass through. Standard lug nuts are too shallow. I suggest you suggest to buyers they purchase a set of chrome lug nuts that are long enough to protrude 3/4 inches past the hole so a socket can easily be connected. Attached is a photo of the lug nuts as well as a shot of my finished Acme Tow Dolly trailer. Thanks again for the speedy shipment. 485295
Wow what great service! Tires and rims look great and where perfect fit! Really enhance the look of my trailer too! Can't beat free shipping and I received them the next day! Awesome!!! 290131
I purchased four tires and wheels, centers, and lug nuts on April 12, 2020 for our pontoon boat trailer. We changed them on May 16, 2020 and they look great! The wheels, centers, and lug nuts fit perfectly. During the purchase process I e-mailed a list of questions and Connor L. responded quickly with the answers I needed. I appreciate the customer service and quality of the products! Thanks 800238
service was great, products look real good and arrived on time. I will use e trailer for my future orders 781928
Great product. Quick service. 782016
excellent service fast shipping 774072
Product as ordered was received. Product Quality and Price excellent. Customer and order fulfillment along with order tracking updates, exceptional. Will definitely order all of my trailer and camper needs from this company and their website. Thanks Again for a great product line, Product Quality and Customer service! 767402
Product is exactly what was to be expected and great customer service. I highly recommend and will use etrailer again 764968
Great service and great product. I had these wheels and tires fast. You will need lug nuts if coming from steel spoke wheels. But thanks to other reviews I was aware of that. Work great on my boat trailer. 763101
They are replacements for the original tires on my tow dolly. I wish the originals had lasted longer (18,000 miles), but the wheels look great. 707145
Everything arrived early and exactly as described! 713522
Tires/wheels were exactly as ordered and customer service was excellent as always. One small gripe. The tires arrived somewhat underinflated and I needed to find a compressor before using. 670497
Found a cut in an existing acme tow dolly tire originally ordered from etrailer.com. Ordered a replacement with my phone the afternoon I discovered the cut. It was shipped free that day. I received it 3 days later. Excellent service with full tracking on shipment. My spare was new. Tire I received enables me to start a 3 month Motorhome trip with 2 new dolly tires. 661125
Only driven about a hundred miles on them, but so far, seem to be doing fine. Look good too 633817
Tires and wheels came today and look great can't wait to hit the road 612856
Shipped fast in strong, sturdy container. Very good quality set of wheels and tires. Excellent transaction. 601159
Showed up promptly looks good wish they would iffer 1 set of lugs and lock regulat price and get one set 50% off to the specific application use of you're order other than that great place to do business 589437
Just wanted to say thanks to Natalie and the people at e trailer. The wheels and tires are great got them on the day I was supposed to. 569574
So far so good, put them on my boat trailer but have only been fishing a few times since. 569086
These are the quality of tires and wheels I was wanting. Great delivery time. 525520
The wheels look great on my aluminum utility trailer. They've only been on for a week, so I can't say a lot about the tires. etrailer is an awesome retailer, and their prices seem to be very competitive. 502870
Waylon - 05/01/2019Very satisfied on EVERYTHING I ordered. The trailer tire was below retail price and an excellent deal. The spare tire holders equally excellent purchase. First I heard of etrailer.com. Its my default website for my trailer needs. Its a NO BRAINER.... 502294
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