轮胎的速度级别怎么分？

S=180(时速不得超过180公里）T=190U=200H=210V=240W=270Y=300
N
140km/h
备用胎Spare
Tires
P
150km/h
Q
160km/h
雪胎,轻型卡车胎Winter,
LT
Tires
R
170km/h
轻型卡车胎LT
Tires
S
180km/h
T
190km/h
U
200km/h
H
210km/h
运动性轿车Sport
Sedans
V
240km/h
跑车Sports
Cars
Z
240km/h
跑车Sports
Cars
(或大于240km/h)
W
270km/h
特型跑车Exotic
Sport
Cars
Y
300km/h
特型跑车Exotic
Sport
Cars