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Isolates the legs to build leg strength
but it keeps the chain and gears clean from any mud or gunk that might be part of your childs grand adventures
From the AT to the Pacific Crest Trail
Type: Bolt-On/Rack Mount
Pinhead locks are unmatched in quality
M21 Rear Derailleur - 6,7 Speed, Long Cage Hard Sided Isolates the legs to buildM21 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
