The S4's track times were hindered by a "lack of grip". Geez, I wonder if all season tires might have been a factor?

H = good to 130 MPH
Q = good to 99 MPH
S = good to 112 MPH
T = good to 118 MPH
U = good to 124 MPH
V = good to 149 MPH
W = good to 168 MPH
Y = good to 186 MPH
Z = good to 149 MPH

Don't ask me why there's no "X", and why they are in no obvious order. That's something only the DOT (or some other govt. agency) knows.

(nt)