New wheels or arches?

[GTRMikie]

My renovated van is fitted with 5x10 Superlight alloys and Yokohama 165/70/10's and "S" discs. Problem is the tyres protrude beyond the body (although it did pass the MoT like this!). I am having to fit tubes to the wheels because I can't get an air tight seal between wheel and tyre, so maybe this wheel and tyre combination is not suitable. So is there a 5x10 alloy wheel out there with a different off set that will take my tyres (they are brand new) and bring the tyres back under the wings. I am reluctant to fit arches, because I prefer the look without, but if I had to fit them which arches do you think would look best on the van. I am leaning towards Group 2 at the moment.