Quote:

Originally Posted by sle39lvr The Basic question I want to ask is: Should PSI be higher on NON RFT's compared to similar spec RFT's? I got 18" staggered wheels on my e90 and I recently put on Michelin Pilot Super Sports. User manual states I should run 36psi front/42psi back for extra load. I ran this on my old NITTO NON RFT Tires (Softer tire from what I experienced) and the fronts had shoulders wear off noting that they were under inflated. I wonder 36/42 is for RFT's and if I should run higher for these NON RFT Michelin PSS's.

Short answer: RFs and non-RF tire pressures are guided by the same tire/load/pressure standards according to U.S. standards: The U.S. Tire and Rim Association. There is NO difference. Size-for-size, RFs and non-RFs carry the same load and have the same PSI requirements.

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