Originally Posted By: edvanp
BMW sets the tire pressure on the stock tires at 31 on the fronts, 40 on the rear. These can be set up to 51psi. Currently I'm running them at 35 front, 45 rear.
Just FYI, I have the same car but with the sport pkg (235/45/17 tires), and when I tried running such high PSI, I ended up wearing out the centers of my tires. I have since backed off and am running the PSI that BMW recommends for the rest of the world (outside of the US), which is 29 PSI front, 33 PSI rear.
BTW, are you planning to run these Altimax through the winter? Let us know how they fare. I just bought Bridgestone RE960 and will run them all year as well, but I don't plan to do a lot of driving when the white stuff's on the ground...