m/t sportsman tire heigth

With that tire you will have no problem running slower than 11.5 (Not very good grip at the track).

For what it's worth, on my old 360 combo I went from running 12.1 @ 116mph on the Micky Thompson sportsman pros, to 11.5 @ 116mph running a Hoosier quick time pro...no other changes, just tires.