All You Need to Know About Tire Sidewall Markings - Rubber Match

Here’s everything you ever wanted to know about those little numbers on the sidewall of tires but were afraid to ask

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Now, let’s figure out what all the other data stamped into the side of your tire actually means.

Traction Grades Asphalt g force Concrete g force
AA Above 0.54 0.41
A Above 0.47 0.35
B Above 0.38 0.26
C Less than 0.38 0.26
Temperature Grade Speeds (in mph)
A Over 115
B 100 to 115
C 85 to 100

Speed Rating mph
P 93
Q 99
R 106
S 112
T 118
U 124
V 130
Z 149+
W 168
Y 186
(Y) 186+

Load Ratings Pounds
101 1,819
100 1,764
99 1,709
98 1,653
97 1,609
96 1,565
95 1,521
94 1,477
93 1,433
92 1,389
91 1,356
90 1,323

Trivia: a typical valve stem weighs about 1.2 ounces more than the aluminum that was bored out to make room for it.

Sources

Nitto Tire
Cypress, CA 90630
877-565-8448
www.nittotire.com
Kumho Tires
Rancho Cucamonga, CA 91730
800-445-8646
www.kumhousa.com
Falken Tire
Fontana, CA 92335
800-723-2553
http://www.falkentire.com
BFGoodrich
877-788-8899
www.bfgoodrichtires.com
Michelin Tire
Greenville, SC 29602
866-866-6605
http://www.michelinman.com
Toyo Tires
800-442-8696
www.toyotires.com
Tire Rack
South Bend, IN 46628
888-541-1777
www.tirerack.com

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