Speed Index Table for Tires

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Below is the speed index table used in the tire industry. The higher the letter the faster the tire can go. Important to note that this is the maximum speed the tire can withstand for up to 10 minutes before failing.

Speed Rating	km/h	mph
A1	5	3
A2	10	6
A3	15	9
A4	20	12
A5	25	16
A6	30	19
A7	35	22
A8	40	25
B	50	31
C	60	37
D	65	40
E	70	43
F	80	50
G	90	56
J	100	62
K	110	68
L	120	75
M	130	81
N	140	87
P	150	94
Q	160	100
R	170	106
S	180	112
T	190	118
U	200	124
H	210	130
V	240	149
Z	> 240	> 149
W	270	168
(W)	> 270	> 168
Y	300	186
(Y)	> 300	> 186

Related: See Tire Weight Index table

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