Park Tool Replacement Brush - GSC-1 Pumps When detecting braking or headlights(>50lux)

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

Form Power

Tripeak BB386 Shimano bottom bracket makes it possible to fit a Shimano Hollowtech II or FSA crankset with 24 mm axle into a 386EVO frame

sodium chloride in CARBORANCE is added for optimal rehydration

Suitable for: Avid BB5 Mech

Park Tool Replacement Brush - GSC-1 Pumps When detecting braking or headlights(>50lux)DESCRIPTION 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.