On my new version Extra the the wider and lighter Kavan 3 1/2 inch wheels on PSP titianum axles were way to wide for the wheel pants. In fact the 3 1/2 inch stock wheels would just barely fit and that was after grinding out almost all of the bottom of the wheel pant. Not sure if the wheel pants on the Edge are the same size or not. Just FYI, I went ahead and got a set of TNT carbon gear and put the lighter wheels and axles on it. Using these peices cuts a full 8 onces. The only down side being the afore mentioned inability to mount the pants and the TNT gear is about 4 inches narrower than the stock gear.

Hope that helps.