While looking for tires I needed to find the metric equivalents to the U.S. tire sizes. I found some charts and a conversion calculator. I put most of the tire sizes into a list. Maybe others will find it helpful in their tire search.

Tire Size Calculator

Metric U.S.

165/80R 15 25 X 6.50 X 15
165/90R 15 27 X 6.50 X 15
178/100 15 29 X 7.00 X 15
178/107 15 30 X 7.00 X 15
215/70R 16 28 X 8.50 X 16
215/75R 15 28 X 8.50 X 15
215/85R 15 29 X 8.50 X 15
216/76R 14 27 X 8.50 X 14
225/70R 16 28.50 X 9 X 16
225/75R 15 28 X 9 X 15
225/75R 16 30 X 9 X 16
225/85R 14 29 X 9.00 X 14
235/70R 16 29 X 9.50 X 16
235/75R 15 29 X 9 X 15
235/75R 15 29 X 9.25 X 15
235/85R 16 32 X 9.50 X 16
245/70R 16 30 X 10 X 16
245/75R 16 31 X 10 X 16
245/80R 16 31 X 9.50 X 16
255/55R 18 29 X 10.50 X 18
255/70R 16 30 X 10.50 X 16
255/85R 16 33 X 10.50 X 16
265/70R 16 31 X 10.50 X 16
265/70R 17 32 X 11.50 X 17
265/75R 15 31 X 10.50 x 15
265/75R 16 32 X 10.50 X 16
265/80R 16 32.50 X 10.00 X 16
275/70R 16 31.50 X 11 X 16
275/70R 17 32.50 X 11.00 X 17
280/75R 15 31 X 10.50 X 15
285/60R 18 32 X 11 X 18
285/65R 18 33 X 11.50 X 18
285/70R 17 33 X 11.50 X 17
285/75R 16 33 X 11.50 X 16
295/70R 17 33 X 12.0 X 17
295/75R 16 33.50 X 12 X 16
305/50R 20 32 X 12.50 X 20
305/55R 20 33 X 12.50 X 20
305/70R 16 33 X 12.50 X 16
305/70R 17 34 X 12.00 X 17
305/85R 16 36 X 11.50 X 16
315/70R 17 34.50 X 12 X 17
315/75R 16 35 X 12.50 X 16
325/50R22 35 X 13.00 X 22
325/60R 15 31 X 12.50 X 15
325/60R 18 33 X 13 X 18
325/60R 20 35 X 13.00 X 20
325/65R 18 35 X 13 X 18
325/70R 16 34 X 13 X 16
325/80R 16 37 X 13 X 16
355/60R20 36.50 X 14.00 X 20
355/65R 18 37 X 14 X 18
365/65R 16 35 X 14.50 X 16
Q78-15 35.50 X 11.00 X 15
Q78-16 35.50 X 11.00 X 16

Speed Ratings:
M=81mph
N=87mph
P=93mph
Q=99mph
R=106mph
S=112mph
T=118mph
U=124mph
H=130mph
V=149mph
W=168mph
Y=186mph
Z=149+mph