im fortunate enough to have an E30 on 14 inch BBS's and one on 15's. both with decent tyres. i use the 318i on 14's as a daily smoke and also for cross country use, often b and C road blatting in Derbyshire and Yorkshire. i havent noticed a deal of difference in grip on the limits of road use but i have noticed that the ride quality is better. both cars have the m tech sports suspension option. the 4 pot is a little lighter but they both seem to handle pretty well. i used to think the 14's looked too small in the arches , but at the right ride height i think they are a decent retro size. after all fast fords run 13's and 14's, the trens for stock cars has left traders asking daft money for capri 13's , in my day everybody whacked on the biggest wheels possible.
my 318 on 14's actually sits pretty nice..wont be fitting any 15's.
