Originally Posted by
modernbeat
Since you chose a second-tier street tire for all-out competition, I'd assume the competition advantages are a lost cause. The chunking is a real concern though. If you compete with most unshaved tires, they wear very rapidly. The Azenis is more resistant than most, but it also suffers from chunking on abrasive surfaces. If you only attend one autocross a month, I wouldn't shave. If you are doing a number of them, or if these are dedicated race tires, I'd shave them.