Originally posted by gotapex:
Z rating: under the older system introduced 1999 spec on tires above 149mph
Y rating: newer system, tire spec at 186mph
(Y) rating: newer system, tire spec at >186mph
Missing the W rating.
Here's the speed rating list:
Notice that an SVT will need either a V, Z, W, or Y rated tire if you plan on topping it out, otherwise you risk your tires breaking down and you ending up all screwed up.
Also make sure you're not out on the interstate going over the rating of your winter tires!
L: 75mph
M: 81mph
N: 87mph
P: 93mph
Q: 99mph
R: 106mph
S: 112mph
T: 118mph
U: 124mph
H: 130mph
V: 149mph
Z: "+149mph"
W: 168mph
Y: 186mph
?: 168mph+ <--- I see this on a few sites, dunno what it's about...
I did hear that cars capable of going that fast usually have custom tires on them.
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