Shimano MF-TZ510-7-CP Multi-Speed Freewheel Shifting All Over After many miles of riding, you'll want to replace your components to ensure your bike performs the best it can. With a new freewheel, your rear derailleur will shift just like new. The Shimano MF-TZ510-7-CP Multi-Speed Freewheel is designed for 7-speed drivetrains and is compatible with freewheel setups. This freewheel comes with a spoke protector to protect against overshifting. Features Designed for 7-speed drivetrains Comes with a spoke protector to protect against overshifting Compatible with freewheel setups Specifications Cassette Body Type Freewheel Cassette Cogs14-28T, 14-34TDrivetrain Speeds7Cassette Material Steel Weight N/A | Shimano | Mf-Tz510-7-Cp Multi-Speed Freewheel 7-Speed 14-28T | Aluminum