M21 Rear Derailleur - 6,7 Speed, Long Cage Kickboards The Bosu Home Balance Trainer

The Bosu Home Balance Trainer is the perfect choice for working on balance

Canting: Double

Medium height ramped center knobs roll fast and provide climbing traction

accurate and features permanent measurement markings

Sprocket: 36T

M21 Rear Derailleur - 6,7 Speed, Long Cage Kickboards The Bosu Home Balance TrainerM21 rear derailleurs are designed to work with 6 and 7 speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. Model No.: RD M21L Cassette Compatibility: 6 7 Speed Cage Type: Long Cage Front Chainring: Double Triple Max. Sprocket: 32T Min. Sprocket: 11T Total Capacity: 43T Guide Pulley: Engineering Composite with Steel Bushing Tension Pulley: Engineering Composite with Steel Bushing