a multi-tool

Water resistant and protects against corrosion

Wing material: Stamped steel

then these are the ones you'll need

XT(RD-M8000)

Shimano XTR RD-M9100 12 Speed Rear Derailleur - Long Cage - 12 Speed Do Not Ship Internationally a multi-toolSmooth, clean and precise gear shifts are exactly what you will get out of Shimano's flagship XTR RD M9100 11 12 Speed Rear Derailleur. The derailleur meets the demands of Trail and XC, Enduro and Marathon racers with its awesome aesthetic, attention to detail, reliability and material choice. It is now lighter, quieter, more durable and more versatile than the previous generation. Shimano redesigned these from the ground up and have made a number of