Trailer Tire to Replace Size B85-13

Question:

I have a B85-13 what size tire do I need. Thanks for your help

asked by: Cary L

Helpful Expert Reply:

B85-13 sounds like an old measurement of tire but it's not one I'm familiar with. However, the B would be the section width and the 85 is the aspect ratio. Two sizes we do carry which will be very close to the same are 175/80-13 and 185/80-13. The latter is most likely the closest to yours although those two are only 0.3 inches different in diameter and there are more options in the 175/80-13 size.

We have one tire only option for the 185/80-13. It's # AM1ST79 which is a bias tire with a max capacity of 1,710 pounds at 65 psi.

A radial is a better tire for highway use so if you'd rather a radial # AM10210 is a 175/80-13 that has a max capacity of 1,610 pounds at 65 psi.

expert reply by: Charles S