Shimano Alivio RD-M3100 Shadow 9 Speed Rear Derailleur Colour:Charcoal FeaturesSecurely attaches to the JustClick

FeaturesSecurely attaches to the JustClick 2 and JustClick 3 bike carriers to provide an additional one bike capacity

fast rolling but grippy 'cross' tyres make it versatile enough to switch from paved surfaces

Installs easily on almost any bike

This pack has grownup features—1

Boasting a total weight of 400g and a compact design

Shimano Alivio RD-M3100 Shadow 9 Speed Rear Derailleur Colour:Charcoal FeaturesSecurely attaches to the JustClickAbout 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