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A dirty bicycle drive leads to poor gear shifting and unnecessary wear of expensive parts. Park Tool Chain Gear contains everything you need to clean the chain, freewheel gears and chainrings quickly and easily. Chain Gang includes a CM-5.3 Cyclone Chain Scrubber, a GSC-1 GearClean Brush and an 8 oz bottle of CB-4 Bio ChainBrite. The CM-5.3 Cyclone Chain Scrubber uses an extra large solvent reservoir and a range of rotating brushes to keep bike chains shiny clean. A magnet at the bottom of the Cyclones solvent container attracts the particles cleaned by the chain, preventing them from being spread back on the chain during cleaning. The durable sponge material pulls the solvent off the chain when it leaves the Cyclone cleaning tool, reducing dripping and dirt. To make it easy to use and use, we even added a handle that works on both sides of the cleaner. Works with all multi-speed and single speed bikes as well as both mid and rear wheel drive e-bikes. The brushes and sponge are interchangeable (part # RBS-5). The GSC-1 GearClean brush from Park Tool has a unique design. A large, comfortable handle with a curved, serrated end reaches the dirt deep between the gears, and durable nylon bristles clean the derailleur and chain. Reduces wear on chain and freewheel. Works well on brakes or other places where dirt accumulates. CB-4 Bio ChainBrite Cleaning Fluid for Bike Chain and Components is a 100% biodegradable, natural, plant-based degreaser for use in the CM-5.3 Cyclone Chain Scrubber, CM-25 Professional Chain Scrubber or as a general purpose degreaser. Does not damage any alloy, plastic, rubber or carbon fibre parts.