And you guys aren't bouncing around all over the road? I've tried different pressures, but what worked well was what is printed on the door: 32 rear, 29 front. I run 215/45's on 17 x 7.5 rims, with stock suspension. If I go higher than what's recommended by BMW, the suspension gets all weird & bouncy, losing grip over bumps and the antilock goes haywire.