i run 29x9 Hoosiers
-7 inch wheel
-no tubes
-12.5 psi - 14 psi
i've put 25 passes on my car in the last 2 weeks at 2 different tracks. 60 fts. were 1.55(best) to a 1.61(worse). 2 different tracks, in really hot/humid conditions and on slippery/greasy race tracks.
-i'll be changing to a 8 inch wheel in the winter. i think the 7 inch wheel is wearing out the side walls prematurely. i'm only getting about 80 passes out of a set.-
*these are examples of my experiences- yours may vary !!