he Muc-Off Bicycle Chain Brush is an essential tool for keeping your bikes' chain and whole drivetrain spotlessly clean and running smooth. The multi-faceted, ergonomically shaped brush is designed to clean 3 sides of the chain at any one time, its bristles v and rollers for a deeper clean, which all help to keep your chain in optimum condition for longer.? The longer bristles on the end can be used to clean other drivetrain components; chainrings, cassettes and jockey wheels.