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When you’re logging long miles in heat or rough conditions, this radial tire stays steady and cool. The Kenda Karrier S-Trail ST145/R12 is an 8-ply Load Range D tire rated for 1,220 lbs at 65 psi with a maximum speed of 81 mph (speed rating M). It’s constructed with double steel belts and full nylon plies to handle sustained towing without excess heat buildup and meets DOT specifications for highway use.
Standard trailer tires can feel stiff and wear unevenly, but the radial cords in this tire run at a 90-degree angle for less rolling resistance and cooler running over the long haul. Its automotive-grade, computer-generated tread includes small breaks in the ribs and thin sipes that channel water away so it holds traction in wet, snowy, or icy conditions. The premium rubber compound disperses heat for longer tread life and improved handling at speed.
Hauling gear always pushes your tires hard, but this special trailer (ST) design uses sturdy sidewalls built specifically to carry heavy loads without squirm or flex. The double steel belts and full nylon plies reinforce the casing so it holds shape under weight while still rolling smoothly on pavement. With its 8-ply rating and 1,220-lb capacity per tire, it’s ready for the kind of loads that make lesser tires sag or overheat.
Tire damage happens when you least expect it, but this one’s covered. For the first 12 months it’s protected by Kenda’s worry-free guarantee—if it’s damaged in any way within that period, it will be replaced at no charge. Combined with a 5-year limited warranty, it gives you the confidence to roll out knowing you’re backed up mile after mile.
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"
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Fred B.
8/3/2025
Still happy as ever
Roberta
9/6/2025
Tires are awesome will purchase again good quality grip the highway very well in rain and inclement weather is pulling trailer way to go thanks E trailer thanksPatrick
Tall iStacey
11/4/2021
Well we cut the fenders in half lengthwise fired up the welder and added 2 inches to their width. That resolved the issue of the tires throwing slop. Taint particularly pretty, but its functional. As for the tires, they are fine. Weve run them a year now, out on the road and around the farm. Im pleased with them. We tend to load our trailer heavy, just had 560 board feet of green lumber on it, the tires didnt seem to mind at all. Except for the mud on them, they look as good as new. They ride well, have not given me any issues at all.
Brent H.
10/1/2020
Excellent! Tires made it through last season in great shape. They seem MUCH more durable than the bias plys I had been running. No punctures, no abnormal wear. My snowmobile trailer has now been sitting a few months but the tires were very impressive last winter.
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Gwendolyn Y.
9/12/2025
Sounds like a home run, Dave! Love to hear that even after 3 years you're still lovin' these tires, and thanks for letting us know how its going! Where are you headed to next with the camper?