Hi ya..
I had 14s, 15s and 17s on my cinq.. the car was lowered 30mm..
14s.. with 185/50 tyres,, no problems with arches or turning circle.
15s.. with 195/45 tyres.. had to have rear arches rolled to stop them scrubbing.. cost 90 pounds for both at R-Tec. Couldnt quite get full lock when turning, but not a problem.
17s.. had to have severe arch work done, xtreme in Harlow did this. Cost 200 pounds. had to have rear bumper removed and skirts removed and reshaped before they would fit back on.The tyres did not scrub with just me in the car, but scrubbed with a passenger. I didnt use the rear seats for passengers after 17s were fitted otherwise i think it wouldve done severe damage. didnt like shopping in boot much either as it scrubbed then too!! not v practical but good fun. Although it scrubbed, and made a horrible noise the tyres didnt actually have any visible damage.
Again, couldnt quite get full lock. Other probs include very heavy steering.. didnt realise quite how heavy til i go new car with pas.
I think wheel size depends on the kit you have one the car to fill it.. its no good having 17s with a shallow kit..
fABULOUS, fEMALE aND tOTALLY fLIPPED