More than a mechanical derailleur with a battery and a motor bolted on

works on 9-12 speed chains

The Top guide

End caps: These grips have replaceable end caps

and insert the cartridge into the backside of the adaptor for storage(the side without the dust flap)

Vittoria Martello Tyre - 27.5 Inch - 2.6 Inch - TR Folding - TNT - 120 TPI Nylon - Graphene 2.0 - 4C - Anthracite Black Virtual Parent More than a mechanical derailleurThe Martello is designed to perform on Enduro and DH courses all over the world. Featuring the World Championship proven TNT bead and a 4C Graphene compound with a moto inspired tread pattern for stability and durability, this tyre is built to go fast on a range of terrain while providing the fine touch tactile feel that top racers expect. Whether shredding rocks, roots, or mixed terrain, the Martello delivers! Features: Moto block square knobs offer