[1320racer]

I believe it's marketing. Regardless, the, 9", 10.5", 13.5" regular CO7 and lite weight CO6 Hoosier radial slicks I've been running since 1999 have always been a "bracket" radial on my Chevelle and Firebird because I bracket raced with them.

Larry, I ran that tire typically at 18 psi and have gone as high as 21 psi. Any other questions about this tire just ask here or PM as you have done in the past.