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.

SOURCE
Kumho Tires
10299 6th Street
Rancho Cucamonga
CA  91730
800-445-8646
www.kumhousa.com
Tire Rack
7101 Vorden Parkway
South Bend
IN  46628
888-541-1777
www.tirerack.com
BFGoodrich
P.O. Box 19001
Greenville
SC  29602
877-788-8899
www.bfgoodrichtires.com
Nitto Tire
6021 Katella Avenue
Suite 250
Cypress
CA  90630
877-565-8448
www.nittotire.com
Michelin Tire
PO Box 19001
Greenville
SC  29602
866-866-6605
www.michelinman.com
Toyo Tires
800-442-8696
www.toyotires.com
Falken Tire
13649 Valley Boulevard
Fontana
CA  92335
800-723-2553
http://www.falkentire.com