well i was looking at a set of racing hart m5s on ebay and the auction says a 51mm offset. I thought it was kind on high too and thats why I asked all of u :-). I wanted to get 17s actually and they are cheaper too but when I put my friend's 17s on that he was selling just to see what they look like, me and him both thought they looked real small. That is why I want 18s. My friend wants me to get 19s but I think that is crazy. They weren't m5's, they were some team dynamic wheels.