Decided to remove the Front fender to make fitting an extender a bit easier. Sounds pretty simple? Not so! When I tried to remove the rear bolts they were VERY stiff and eventually just turned on their own. The reason? They have a square-shaped spacer/nut combination thingy that sits in a flimsy plastic surround inside the wheel area and the bolts are loaded with thread lock. In the end I had to hold the "nut" with small grip-locks and slowly work the bolt out. I ended up drilling out the 6mm spacer to 6.5mm, replacing the bolt with a longer one and putting a nylok nut on the end. Of course, I might just have been unlucky, this is just a "heads up" in case this happens to you and what seems to be a simple job turns into a marathon.