Park Tool Gear Clean Brush Compatible With 5–12 Speed Cassettes 

One of the first time-savers they invented was a stand that held the bike off the ground allowing easy, back saving access to any part of the bike. This original stand was put together using legs from a dining room table, an empty shell casing and a truck axle from a 37 Ford. As other shops, and eventually Schwinn Bicycle Company, saw the stand in action, requests were made for a production model. Park Tool Company was born!

The line grew quickly to include a wheel truing stand, more repair stands including a double arm shop version, wrenches gauges, fixtures and consumer tools soon joined the company's offerings. The retail side of the business also grew earning Top Ten Schwinn dealer status fifteen years in a row including number one overall in 1977. In the early 1980s all three retail shops were sold to concentrate on the tool business.

Park Tool Gear Clean Brush Compatible With 5–12 Speed Cassettes 

Park Tool’s 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.

A simple brush design that makes it easier to keep your transmission clean

Curved and toothed end for cleaning out between sprockets

Stiff nylon bristles for thorough cleaning of derailleurs and chain

Also handy for cleaning behind V-brakes and other hard to reach places

Compatible with most 5–12 speed cassettes and freewheels

Handy size for quick cleaning anywhere

Made of sturdy nylon