Reverse Single-Speed Spacer Kit Get The Perfect Chain Line If you have a geared setup and you want to change your bike to single speed, you'll need some spacers. The Reverse Single-Speed Spacer Kit makes it easy to get the perfectly straight chain line. This allows you to position the sprocket optimally on the freewheel body. The Single-Speed Spacer Kit comes with 7 spacers and a lock ring. Features Made from aluminum Comes with 7 spacers and a lock ring Makes it easy to dial in your chain line | Reverse Components | Reverse Single Speed Spacer Kit Black