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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

 
 
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Old 12-13-2012, 08:27 AM
sle39lvr sle39lvr is offline
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Location: South Florida
 
Join Date: Dec 2012
Posts: 128
Mein Auto: 08 E90
RFT vs Non-RFT Air Pressure Question

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.
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