[bill dedman]

I have 9"-wide, bias-ply, M-T slicks on Centerlines with no tubes (the info for the tires says they require tubes, but they seem to hold air very well without tubes), and I am wondering if I put screws in the bead if I'll develop leaks? If I do need them, I wonder if 4 per side will be enough, or if I'll need more? These tires probably won't work well with 20 pounds of air in them.... I'll end up running 12-15, probably.... just a guess.

Any info or advice will be appreciated: mid-11-second car @ 3,600 pounds with me in it.