laobo979

iTrader: (5)

Is it ok too run 235-40 on 18x.0 front and 265-35 18x8.5 rear on my IS350?

mitsuguy

iTrader: (2)

Though it is possible, on a RWD IS, all of the stock programming for ABS, traction control and stability control expect a difference in diameter front to rear. Your sizes are almost identical front to rear. You should do a 265/40 on the rear if you do a 235/40 on the front