Park Tool Replacement Brush - GSC-1 Pumps Wheel Options: Compatible with 700C

Wheel Options: Compatible with 700C & 650B Wheels

When detecting braking or headlights(>50lux) from rear approaching vehicles

Form Power

Battery charger for BT-DN110

Park Tool Replacement Brush - GSC-1 Pumps Wheel Options: Compatible with 700CDESCRIPTION The original replacement brush for the most popular cassette and drivetrain cleaning brush The GearClean Brush (GSC 1) from Park tool. This replacement helps you save money will reusing the old GearClean brush head longer and longer. The tough nylon bristles clean the derailleur and chain. Saves wear and tear on your chain and freewheel. Works great on brakes or other places where dirt collects.