Friday, February 9, 2007

Reading a Tire Sidewall

235/35R19 91Y

235 = Tire Section Width in milimeters
35 = Tire Aspect Ratio (Sidewall height as a percentage of section width)
R = Radial Construction
19 = Wheel Diameter
91Y = Load index and speed rating

Tire Speed Ratings

R = 106mph
S = 112mph
T = 118mph
U = 124mph
H = 130mph
V = 149mph
W = 168mph
Y = 186mph
Z = 149mph+

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