i bumped my psi to 48 and it has made a significant improvement than the 35 it came with, there is less body roll and it seems to help with the feedback a little during higher speed cornering. however IMHO i love how smooth the car rides, all the speed bumps in this area are the "long and low" ones and the car seems to stop any rebound really quickly while transferring very little motion to the car.
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View my fuel log 2014 Mirage ES 1.2 automatic: 54.7 mpg (US) ... 23.3 km/L ... 4.3 L/100 km ... 65.7 mpg (Imp)