most optimal setup is 10.5 front and rear?
Most of the folks do 9.5 and 10.5 for the track. I heard from other e92 m3 drivers, they are not satisfy with their 9.5/10.5 They wish the front is 10.5. I am curious why they go that further? 9.5 already fit 295 slicks like R6. What's the up and down for this setup?