JPS

Just got some new (95% street 5% autox, maybe DE if lucky) tires (went with the new Bridgestone RE750s 225/45/17 & 255/40/17), and don't have time to put the 400-500 miles to get the tire mold chemicals out.

I have about 80 on them now (30 or so of them quite spirited, and definitely scuffed them up a bit), and will likely get maybe another 150 or so before the AutoX on Sunday (will of course try for more).

Questions:
Will this be enough break in or am I going to spin?
Do I need to worry about chunking or anything on the new tires?

Thanks,

Tom W

You'll be fine at the autocross. You won't hurt the tires and you won't have any spins that are the tires fault. You will leave with less tread than you started though! Watch your tire pressures as the runs and the weather cause them to heat up.

The track at the airport for this autocross can be fairly dusty (ie, slippery) and, depending on how they lay out the course, can be pretty slow or pretty fast. The little banked part from the old go-cart track is fun. Many of the turns are pretty tight so trail braking can be used to help get the rear around. There is nothing near the autox site so don't forget water and your lunch.

jim944s2

Yeah, you'll probably be fine, they may be a hair greasy your first run. I've run the RE730s and currently use S03s. I put similar to your mileage on the S03's prior to auto-x, they have worked very well.