Can a Different Tire Size be Used in Place of a 7.00-15 Tire

Published 08/20/2014

Products Featured in This Question

Loadstar ST185/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D

(7496)

$162.35

Loadstar ST205/75D15 Bias Trailer Tire - Load Range C

(3858)

$79.91

Loadstar ST225/75D15 Bias Trailer Tire - Load Range D

(3858)

$142.18

Question:

I need to replace a 7.00 x 15 inch tire on a 15 x 5 inch rim what size is that in say st205/75d15 or what? I prefer a bias tire Thanks

asked by: Ken

Expert Reply:

Size 7.00-15 is actually a currently used tire size. It is a light truck tire. Light truck tires are sometimes used on RVs and trailers (as long as the LT is at the end of the size). It is a bias ply tire. It is rated for 2,402 pounds at 70 psi. The overall diameter is 29.4 inches and the width is 7.8 inches. It fits 15" x 5", 15" x 5-1/2", 15" x 6" rims. We do not carry this size.

By comparison, an ST205/75-15 # AM1ST92 is rated lower at 1,820 pounds at 50 psi. And it is wider at 8.1 inches, but shorter at 27.3 inches. It fits 15" x 5", 15" x 5-1/2", 15" x 6", and 15" x 6-1/2" rims.

And the other option, an ST225/75-15, # AM1ST96 is rated a little higher at 2,540 pounds at 65 psi. it is 8.4 inches wide and 28.1 inches tall. It fits 15" x 6", 15" x 6-1/2", and 15" x 7" rims.

If the trailer is supposed to have 7.00-15 tires on it though I would stick with them. Especially since the only overlapping rim size all three of these tires will fit is 15x6.

expert reply by: Michael H