BMW says: Front: 2.5 bars & Rear: 2.9 bars
Front: 36 psi
Rear: 42 psi
Yeah. I didn't think pressures would gain 10+psi from running on the track hard. Maybe 5+ psi. It was a 105*F ambient temp that day, so maybe that plays a factor? I talked to a tire vendor and a few course riders and they said a sweet spot is 30-32 psi warm for most tires. I originally had cold at 30PSI cold, but warm temps were 40PSI! too hot, felt "slippery" in corners (I would lean in, but felt like understeer in car terms). I removed some air between sessions to drop the warm down to 32 PSI. Unfortunately, I rode home on the same tire pressure since I didn't think to bring a pump, nor did I bother to ask to borrow anyone elses. Checked the cold PSI the next day and it was at 22 psi front, 21 rear. 32PSI warm front/rear felt predictable, stable, and provided me enough grip to corner such that my engine guards kissed the track regularly, and hold the line with confidence. 30/30 may have been better, but once it felt good enough, I opted not to mess with it anymore.for the guy who runs 20/21 at the track cold, that's nuts! anything under 30/30 i think you're asking for it.