Originally Posted by
europa
Actually, those washers were mentioned in a discussion on stopping the wheel slipping in the dropouts. I was having trouble, Sixty Fiver offered that suggestion as one solution used in his shop.
That's a common problem with hubs like that on the track. Phil hubs use allen bolts, too. The best solution is to use a chain tensioner and/or a cone like this, which spreads the force of the bolt over a larger area:
