This is probably the rarest part you could find for the Huffy Muscle bikes. It is a rear 5 speed mag wheel. The mag you see is plastic with a metal mag under it. There is only 1 other bike that has been seen with this mag. There is another mag like this floating around out there somewhere and maybe more. I paid $400 for the mag shipped and have already been offered 3 times that amount for it. It will find it's way to a nice Huffy Rail soon.