Park Tool - GSC-1 GearClean Brush Stock Item:Null Park Tool Replacement Brush - For GSC-1 they have to endure tough

they have to endure tough tests such as the Paris-Roubaix

and three multi-purpose mounts on the fork blades for stowing essentials

and is proof of truly exceptional performance

15 x 150 - (198/10mm) Orientation Front Thread Pitch M15 x 1

Park Tool - GSC-1 GearClean Brush Stock Item:Null Park Tool Replacement Brush - For GSC-1 they have to endure toughPARK TOOL GSC 1 GEARCLEAN BRUSH Park Tools GSC 1 GearClean Brush has a unique design. A large comfortable handle with a curved, toothed end reaches dirt deep between the gears, and 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. 10 speed compatible Handy size for quick cleaning anywhere Made of sturdy nylon