175/80/14's fit mine fine front and rear.
I did move the front bulkhead back 20mm and bash them in with a lump hammer though. 175/70/14's should be a good fit but don't quite fill the arches like the 80 profiles do though. You can clearly see the difference in looks between mine (when it was on 70 profiles) and Phil and Barry's cars on 80's in this picture -
