@ARCSYup, 224's work just fine as Mr Tidy has stated, as long as they're fitted with tyres that are a profile lower than standard M's.
Here's my old e85 with Bilstein + Eibach suspension paired with 225/40, 255/35 tyres with 10mm spacers on the front, and i had no issues.
View attachment 282170
@ARCS
I assume you had to do the spacer up front because of the different offset of the 224 front wheel?
Astheticly, it needed a 10mm spacer imo, but not necessarily required.You don't actually need a spacer on the front as 224s are 8J x 18 ET42 and the 108, MW2, etc fronts are 8J x 18 ET47 so 224s will sit 5mm further out anyway.