17 inch alloys on a cupra

Dont think 17's clear the cupras brakes!

^^ what he says ^^

Some 17's will fit, the problem is not only the inner diameter of the rim but also space between rim's spokes and calliper.

Example:
http://www.golfmk5.com/forums/showthread.php?t=74594

Some 17,s will fit.
I have 17,s on my Leon which has s3 brakes (same spec as Cupra brakes).
17" Audi a3 sport alloys fit straight over the brakes.
17" Leon sport alloys fit with small spacers when pads and discs are new. Now that the pads have worn down I have been able to remove the spacers.
Hope this helps.