Replacing ST225/75D15 Bias Trailer Tires With Kenda KR53 Radials  

Question:

Expert Reply:

Hey Jason, welcome back! Yes, you can switch from your ST225/75D15 bias ply tires to ST225/75R15 radials. Since you're replacing the wheels too, I recommend the Kenda Karrier KR53 tire and wheel assemblies. You can choose from the following based on the wheel color you prefer:

-Kenda Karrier KR53 with Black Steel Wheel # KE64WV

-Kenda Karrier KR53 with Silver Steel Wheel # KE44WV

Both come mounted on 15" wheels with a 6 on 5-1/2 bolt pattern and have Load Range E tires rated for 2,860 lbs at 80 psi. The radial construction is a nice upgrade for highway towing since the tires generally run cooler and provide more even tread wear than bias ply tires.

You'll just want to make sure the 6 on 5-1/2 bolt pattern matches your existing wheels and that the Load Range E capacity meets your trailer's requirements.

What kind of equipment are you hauling on your trailer?

expert reply by: Robin H

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KE44WV
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KE64WV
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Jason

10/29/2026

Thanks Robin! I mostly haul a compact skid steer on the trailer. I'm going with the black wheels and replacing all four. Would you recommend getting a fifth one for a spare, or is it fine to keep my old bias-ply spare?

Robin H.

10/29/2026

@Jason I recommend getting a fifth # KE64WV for your spare so it matches the new tires and wheels. That way, if you have a flat, you won't have to worry about mixing tire constructions or using an older spare that may be past its useful life. You'll also have a complete replacement ready to install when you need it.