Make Model Spec ALPINA 3 SERIES. B3 E46 3.3 3 SERIES. B3. 3.3 E46 (328I DONOR) tyre pressures Size Front Tyre Buy Tyres 225/45R17 Z 91 2.3 BAR / 29 PSI Buy Tyres 225/40R18 Z 88 2.3 BAR / 29 PSI Buy Tyres What should my pressure be?