Shimano Alivio RD-M3100 Shadow 9 Speed Rear Derailleur Colour:Charcoal The cutting-edge molecules fill the

The cutting-edge molecules fill the bigger holes and tears

Proprietary design ensures smooth shifting and strength

SRAM and all other12 speed drivetrains

the MXR 20 bridges the gap between 18" and 20" wheel sizes - meaning you can get him onto bigger wheels earlier and keep him there longer

130mm trail bikes

Shimano Alivio RD-M3100 Shadow 9 Speed Rear Derailleur Colour:Charcoal The cutting-edge molecules fill theAbout Shimano Alivio RD M3100 Shadow 9 Speed Rear DerailleurThe SHIMANO ALIVIO M3100 rear derailleur delivers a low profile design that lets you ride aggressively with fewer interruptions thanks to its SHIMANO SHADOW design. FeaturesLow profile design Total capacity: 45T Max. low sprocket: 36T Adjustment barrel SpecificationsModel No: RD M3100 SGS Series: SHIMANO ALIVIO M3100 Series Compatible Chain: CN HG53 9 speed Total Capacity: 45T B Axle Hollow