+1 for the rims from Gavin Wallace. I have the 18s which are designed specifically to accommodate the brake calipers of the M3P. I have CrossClimate+ on them and I didn't bother changing back to the stock 20s over summer. More forgiving ride and much less susceptible to pothole damage than the 20s . Couple of grands worth of stock wheels and tyres stored in the garage which won't be doing anything until next April when I may give them another airing
Is Gavin Wallace a user on here? (Sorry, I must have missed it in the thread) - Also, who did you use to swap the wheels over?