PSI for 20" wheels (275/315)?

[pyro4ik]

(2005 4.4 X5) I'm running 20" wheels with 275 in the front and 315 in the rear. I've done some searching, but not sure what the right PSI would be.

I had 315's on the rear of a Camaro before and too much or too little air would wear the tires funny (solid axle rear, so no alignment issue).

[crystalworks]

I don't recall what factory inflation is (32 or 34 sounds familiar) but I run mine at 36psi as a matter of preference. No unusual tire wear except for the typical BMW negative camber wear which can be combatted by regular rotations.

[TiAgX5]

You are aware there's a tire inflation guide on the driver door jamb, right?

[g300d]

I recall from memory that on the 4.6 on 20's it's 32/32 for a standard load.

More air for a fully loaded car, cant remember how much at the moment.

[Qsilver7]

Originally Posted by TiAgX5

You are aware there's a tire inflation guide on the driver door jamb, right?

Ditto...its on the driver's door or door jamb...plus it's also in the owners manual.

The "recommended" inflation is dependent upon speed and number of passengers/cargo. If the recommendation doesn't suit your needs...then adjust accordingly in small increments: