[ozinaldo]

First of, this is the 1M section of the Forum, so overall tire experience here might not be the best for you. If your car is a 135i convertible which is in your sig, all I can say is I am surprised to hear that "recommended tire pressure is 39 psi" for a 135i, sounds really high to me. For a 1M, factory recommendation is 33/34 front and 31/32 rear (unloaded car).