Read the sidewall of your tire... it should say something like "do not inflate past 40 psi".
I'd inflate em to 45psi... at least 5+ over. (As long as they're new and undamaged... cause over inflating used/damaged tires will just put stress on the existing wear and tear.)
*For ex: If it's a Z rated tire.. capable of 149mph, that speed rating is only if the tire is inflated to max psi.
ED & PCD = DONE & DONE! 08' AW/Coral 335i coupe 6-speed (Premium Pkg, Sports Pkg, Heated Seats) *European Delivery