Well I made a atempt at the roller blade wheel. I made the groove which is good. I put it on the bike but when you tighten it. The wheel wont spin so the chain just drags across it. How do I secure it so that the wheel will spin with the chain? Dac you made it sound so easy just get a couple of washers yeah then what? I put the bolt through the wheel with a couple of small washers on both sides. What am i doing wrong here?