offsets or spacers

Hi, I’m just wonder has anyone got 18inch alloys with an et42 offset and have their car lowered does the wheels catch the arch gap even if you don’t have a lowered leon how does it drive on that offset etc etc? Any advice at all would be appreciated!

Right, ive had a good search through, but come up with no definitive Standard offset on the cupra?? 41 or 42mm?? or something else?? When people fit 20mm spacers, does the offset go to (if offset is 41mm say) 21mm?? The reason i ask, is that im eying up a set of rims, that are 7.5x17...