Rear tire PSI ??

What is the lowest PSI you guys would run your rear tires on ? I have mine at 38 right now nitrogen filled. Sometimes I think they are a bit stiff/bumpy so I was thinking of lowering them to 36 or 35 maybe ? Fronts are at 32. I have a 2005 645CI with 19's miro reps.

Originally Posted by joepipe

What is the lowest PSI you guys would run your rear tires on ? I have mine at 38 right now nitrogen filled. Sometimes I think they are a bit stiff/bumpy so I was thinking of lowering them to 36 or 35 maybe ? Fronts are at 32. I have a 2005 645CI with 19's miro reps.

should be 33psi for coupe & 38psi for vert.

I bought non-run flat yokohama s-drives 19 inch so I'm wondering if the door chart is ok for those also. Factory 2005 645CI came with RFT Bridgestones and it shows 29 front psi and 32 rear psi for 2 passengers.

Hey Joe,
How do you like the Yokohama? I have to purchase some new tires and the factory ones are reported poor by consumer reports.

So far the Yokohamas handle great ....we'll see how they are in the long run as I've only had them 2 weeks