A dirty drivetrain causes poor shifting and unnecessary wear to expensive parts. The Chain and Drivetrain Cleaning Kit contains everything needed to quickly and easily clean the chain, freewheel cogs, and chainrings. FEATURES: CG-2.4 works on nearly any bike including multi-speed, single-speed, and e-bikes Includes: CM-5.3 Cyclone Chain Scrubber, GSC-1 GearClean Brush, 8 oz. bottle of Bio ChainBrite