just like wide wheels , always have , anyway had a wee look under the arches there , i have 18x8 with 225 x40 on at the moment and theres not a mission of putting anything wider on theres about a 10mm gap between the tyres and suspension wouldnt risk wider , . , theres very little room to manover with mk 5 , dont know where other boyo got his info from , yes i agree will mess up gearing and speedo , need 2 front tyres so will put money into 2 pilot sport 3 instead, had goodyear f1 on but didnt like them goin back to mich,s