Shimano XTR RD-M9100 12-speed Shadow Plus Rear Derailleur

The XTR RD-M9100 rear derailleur by Shimano - for 1x drivetrains

The XTR RD-M9100 rear derailleur was designed by Shimano exclusively for 1x12-speed drivetrains. It has enlarged 13-tooth sprockets for smoother operation and an additional stop on the swing arm that reduces noise. Of course, the Shadow+ damping technology is also used here, where a stabiliser counteracts sagging, slapping and dropping of the chain. Several pieces of the RD-M9100 are made out of a lightweight carbon. The XTR rear derailleur is available in two versions, namely with a shorter cage (GS) for 10-45 cassettes and with a long cage (SGS), which can shift 10-51 cassettes.

Guidelines for Replacing E-bike Components:

Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance.

Specifications:

Series: XTR M9100
Application: Cross Country, Enduro
Gearing: 12-speed
Mount: standard
Capacity: 35 tooth (short), 41 tooth (long)
Compatibility: Shimano MTB 12-speed
Compatibility - Chains: HG 12-speed (e.g. CN-M9100)

Technical Information:

Derailleur Pulleys: 13-tooth
Outer Cage Material: carbon (CFRP)
Inner Cage Material: Aluminium
Other Materials: aluminium, stainless steel, carbon (CFRP)

Compatibility:

MTB 1x12-speed:
Shifter: SL-M9100, SL-M8100, SL-M7100, SL-M6100
Cassette:
- short / GS: 10-45 T: CS-M9101-12, CS-M9100-12, CS-M8100-12, CS-M7100-12
- long / SGS: 10-51 T: CS-M9101-12, CS-M9100-12, CS-M8100-12, CS-M7100-12, CS-M6100-12
Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100
E-Bike: EP8 for MTB / Trekking, STEPS E8080

Features:

- lower preload in the lower gears to avoid too high of a chain tension
- additional stop on the shift rocker for low-noise drivetrain
- larger 13 t upper pulley
- GS version with 28 mm more ground clearance
- cage plates painted/anodised
- 8 pivot bushings, fluorine-coated
- derailleur pulley bearings sealed

Technology:

Shadow RD+
Shadow Plus rear derailleurs are just as low-profile as Shimano's Shadow rear derailleurs. In addition, a stabilizer with on/off switch is used to reduce chain slap and thus counteract chain drop. At the same time, this results in a quieter drive. Weight is also saved compared to other chain restraint devices.

Models:

short:
Cage Length: GS
Max. Largest Sprocket Teeth: 45-tooth
Min. Largest Sprocket Teeth: 45-tooth
Max. Smallest Sprocket Teeth: 10-tooth
Min. Smallest Sprocket Teeth: 10-tooth
Max. Chainring Difference: 0-tooth
Total Capacity: 35-tooth
Manufacturer Number: I-RDM9100GS

long:
Cage Length: SGS
Max. Largest Sprocket Teeth: 51-tooth
Min. Largest Sprocket Teeth: 51-tooth
Max. Smallest Sprocket Teeth: 10-tooth
Min. Smallest Sprocket Teeth: 10-tooth
Max. Chainring Difference: 0-tooth
Total Capacity: 41-tooth
Manufacturer Number: I-RDM9100SGS

Contents:

- 1 x Shimano XTR RD-M9100 Shadow+ rear derailleur