BMW F30 Alloy Wheel Compatibility?

[ukbikerider]

Afternoon

My current F30 has 19" M Star-spoke style 403M alloy wheels, Is it a straight swap if I want to fit some 18" M Star-spoke style 400M alloy wheels??

Cheers In advance

[Locknut]

If you want to keep the gearing the same and keep the speedometer accurate you will need higher profile tyres on the 18 inch wheels so as to keep the rolling radius the same. There are several tyre-size calculaters on the web.

You should also check that smaller wheels clear the brakes, but I suspect you will not have a problem here.

[Monty Python]

You'll only run into clearance issues if you have the M Sport or M Performance braking system (which is unlikely on a 320d).