Boat Trailer Tires and Wheels

Boat trailers live in saltwater, so this page is built around galvanized steel: hot-dip zinc coated wheels that shrug off the ramp, listed bare and with trailer tires already mounted, balanced and inflated. Sizes run from ST175/80R13 on 13x4.5 for jet ski and small aluminum boat trailers, through ST205/75R14 and ST205/75R15 for the common single and tandem-axle boat trailer, up to ST225/75R15 and ST235/80R16 for larger offshore rigs. Bolt patterns are 5 on 4.5, 6 on 5.5 and 8 on 6.5.

Orders ship from the U.S. with tracking. Lug nuts are sold separately. Prefer aluminum? Our HPD and Road Ready aluminum wheels are listed under each rim size.

Common questions

What size tire is on my boat trailer?
Read the sidewall. Most single-axle boat trailers under 3,500 lbs run ST175/80R13 or ST205/75R14. Tandem-axle and larger boats run ST205/75R15 or ST225/75R15. Match the size and load range exactly.

Radial or bias for a boat trailer?
Radial, if you tow any distance on the highway. Bias is fine for a short run to the ramp and costs less.

How often should boat trailer tires be replaced?
Every five to six years regardless of tread, because sun and salt age the rubber from the inside. Check the DOT date code on the sidewall.