Having installed a Hot Wheels wide body kit from Extreme Dimentions on my 2007 GTI (pictures to follow) which brings the fenders out 2 1/2 inches further from body. I was considering getting spacers and keeping my old wheels but I would need about 70 mm. Or I can buy new wheels. What is offset and how can I figure out what wheels will bring the tires out to the edge of the fender? Any suggestions? Help please. Thanks.