I have a 2002 330ci w/ sports package.
Front- 225/45R-17
Rear- 245/40R-17
I have been reading some who say to to run 40psi at all 4. I've also read to have higher PSI at front tires, 40/38 and 42/37.
I am going on a 1000 mile road trip tomorrow and wouldn't mind some accurate information regarding the tire pressure.
Thanks.
It should tell you what size to run on the door jamb sticker
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I always set them at 36 front, 40 rear.
But yes, check the door jamb sticker. I wouldn't go less than 35 in front.
ASE and BMW Master Certified Technician
The sticker recommends higher pressures in the rear, assuming that there will be people or luggage back there.
If you run empty 99% of the time, like I do, run all four tires at the front tire pressure, since the vehicle is balanced 50/50. Then just raise the pressures in the back a few psi if you're going to load up.
Always 40/40 for me
40 in the front just seems a little high to me. But who knows. Would you even be able to feel 4 psi difference?
ASE and BMW Master Certified Technician
Yes 39/40 is totally fine. I prefer 36/40 myself.
What tires are on the car? It does matter! I ran Yokohamas for a while and set the pressures at 36F/40R. With Michelin PS2/PSS I ran 34F/36R. Both were the appropriate pressures for the respective tire.
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