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Hey guys just switched the radials off my Challenger and went back to the biasply slicks. I put ten passes on them Saturday during the bracket race but never really got them broke in. They are still smooth on 90% of the tire like it has never touched the track. They weren't hooking very good either as my 60' was off about .08 all day until the semi's where it picked up .04 in the 60'. My real question is, how can you tell if you have to much air pressure or not enough? I started off with 12psi, then 11, then 10 with no real changes in performance. The center of the tire still has the mold strip down it like it has never touched.



Being that they were new you need to do a GOOD burn
out the first time(most brands) that breaks the surface
and gets the resins up... also like the others said
no marks in the center you need more air and the
other way as said