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Hauling long distances or running in hot weather is no problem for this setup. The Kenda Karrier S-Trail ST145/R12 radial tire is Load Range D with an 8-ply rating and a 1,220-lb capacity at 65 psi. It’s matched to a 12" x 4" steel wheel rated at 1,250 lbs. The M-speed rating (81 mph) and DOT compliance give reliable highway performance for extended trips without worrying about heat build-up or tread wear.
This tire is built for endurance. Double steel belts and full nylon plies combine to create a strong carcass that stands up to repeated towing and heavy loads. The premium rubber compound disperses heat while maintaining shape, so you get longer tread life and consistent grip even when you’re running loaded for hours on the road.
The tread design borrows from automotive tires for better control. Computer-generated ribs with breaks let water move off to the sides, while thin sipes cut into the rubber channel water away from contact surfaces. That means improved traction when the road is wet, snowy, or icy—exactly when you need it most.
A solid connection matters when towing. Beveled stud holes help keep the wheel snug against the hub so lug nuts don’t loosen over time. The white powder coat over an e-coat primer protects the steel against rust and corrosion from road spray or humidity, keeping the wheel looking clean season after season.
No extra steps before hitting the road—this combo comes mounted and inflated to spec. With a standard 5 on 4-1/2" bolt pattern, 3.19" pilot diameter, 0 offset, and 1/2"-20 wheel bolts, it installs easily and fits right where you need it. It’s a simple, complete setup that’s balanced, durable, and ready to roll.
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:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Steven
6/5/2026
Excellent, big difference in the ride.
Nick
1/23/2024
Not a year yet, but vacation Jan 2024, took me over 2000 milestotal on these tires , Northern Indiana to Sebring Florida and back. No problems with tires.
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Joshua
1/14/2026
Took it across the country 2K miles each way and tires seem to be holding up at 75 mph highway speeds with surprisingly modest wear... HUGE difference from the old bias plys which wore unevenly and fast cuz not rated for over like 55mph and they heat up get soft and start wearing away fast ... love having radials for boat tires for highway hauling as they ARE rated for over 55mph and hold up MUCH better... worth the extra $$ in terms of lifespan and peace of mind.