The only thing that matters is the rolling radius of the wheel is close to original (for sake of the speedometer and ECU) then as others have mentioned the wheel offset and bolt PCD. It won't have any effect on the gearbox, bearing in mind the C510 transmission which is used on all SDE variants FIAT Suzuki, GM etc is also being used in the 500 Abarth which has virtually twice the power and torque.