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This combo is built for the highway. The Kenda Karrier ST145/R12 radial tire has an 8-ply rating and carries up to 1,220 lbs at 65 psi with a speed rating M (81 mph). The matched steel wheel is rated for 1,250 lbs, giving you solid headroom for long-distance or heavy-duty use. The radial design runs cooler than a bias tire, keeping rolling resistance low and tread life high mile after mile.
The 12" x 4" modular steel wheel is protected by a two-step finish that includes an e-coat primer under a black powder coat. That finish makes it tough against moisture, road salt, and grime so corrosion doesn’t take hold. It’s a wheel that stays sharp looking while holding up to real-world towing use year after year.
No hassle getting on the road. This tire comes pre-mounted on its wheel and meets DOT specifications right out of the box. The assembly uses a common 5 on 4-1/2" bolt pattern with a 3.19" pilot diameter, 0 offset, and 1/2"-20 wheel bolts for straightforward fitment.
Kenda’s special trailer radial design combines double steel belts with full nylon plies for durability and steady handling. The computer-generated tread pattern provides reliable traction in wet or dry conditions, keeping the ride smooth and predictable even through long highway hauls.
This tire includes a one-year worry-free guarantee—if it’s damaged in any way within the first 12 months, it’s replaced at no charge. Plus, there’s a five-year warranty on the tire itself and a limited one-year warranty on the wheel for dependable backup coverage.
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
Rich
3/11/2026
So far so good. Have not had any issues with this tirewheel combo traveling at highway speeds.
Jeremiah
4/28/2022
One year later, and these are still great tires. Super smooth and straight at high speeds on the highway. No complaints!
Darrell
7/12/2026
Flawless! I love these tires. My boat has never ridden so smooth. Not sure whyvi havnt put these tires on before! I cant even tell the boat is behind the truck! Will buy these in the future.
Ed F.
1/13/2021
Needed a spare since purchase of boat, many different tire a d rim sizes on trailers, found the correct one on your site, hole pattern and dimensions were right on.
Billy
11/7/2024
Tires and wheels have held up great, looking to get several more yrs out of the tires amd wheels will probably last a lifetime. Very satisfied with my purchase of these wheels and tires and will buy another set of needed for future project
Tk
4/22/2026
Theyre working out great, no issues ????
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Nick S.
11/3/2025
What a great way to start a Monday! I am glad your experience was great with us and you got what you needed quickly. That is a really unique looking trailer, is it just a cargo trailer or more of a camper? I haven't seen one of those before, but the black rims pair well with it.