I’ve got a Mk1 focus diesel daily and I put a set of focus mp3 17s on it a few months back. The tyres are all needing replaced and will be in the next couple of days. Anyway it’s got 215/40/17 tyres on it but the way the roads are nowadays up here I want something with a bit more sidewall to absorb the potholes when I haven’t seen them and swerved like a maniac.

so my question is can I up the profile to say 45/50 and get away with it without having to touch arches and splash guards etc. Oh the car sits standard just now but I’ve coil overs waiting to go on when I get 5 mins to myself