I'm in the process of refurbing my alloys and the tyres that were on the front are a bit battered in the edges...they catch on the arches a bit because the tyres are too big 225/40/18. On Mk4 hatch btw

so i am hoping by getting some 215/35/18 that will sort that issue, thing is the rear tyres have no problems and are almost new tread wise.

So will it cause any problems running 40 profile on the back and 35 on the front? I know legaly as long as they are the same on both sides of the axles they are ok, but handling or safety wise is there any other issues?