SHIMANO XTR RD-M9100 12-SPEED GS REAR DERAILLEUR

The Shimano XTR RD-M9100 is a premium 12-speed rear derailleur engineered for serious mountain bikers.

Its aggressive angled design combines striking aesthetics with functional performance, featuring anodised aluminium construction for durability and reduced weight. The derailleur incorporates 13-tooth pulleys that minimise friction and enhance shifting precision across the full 10-51T cassette range. Shadow RD+ technology delivers exceptional chain retention on technical terrain, while the SGS long cage accommodates maximum gear range flexibility. Compatible with 12-speed CN-M9100 chains, this XTR component represents Shimano's pinnacle of off-road drivetrain innovation. Weighing just 240g, it's the ideal choice for riders demanding reliability and performance on any trail.

Features

• Shadow RD+ For optimal chain retention
• RD-M9100-SGS  
  
  • 51T max cog size
  • Works with both 12-speed 10-51-teeth cassette
• Pulley size with 13T increased for reduced friction

Specification

• Use: MTB
• Group: XTR M9100
• Model: RD-M9100
• Mount: Direct attachment (Conventional)
• Technology: Shadow RD+
• Gradations: SGS-Type 1x12-speed (10-51 cassette)
• Compatible chain: CN-M9100 12-speed
• Max. teeth large sprocket: 51T (SGS)
• Min. teeth large sprocket: 51T (SGS)
• Max. teeth small sprocket: 10T
• Min. teeth small sprocket: 10T
• Max. Front Difference: 0T
• Total Capacity: 41T (SGS)

Pulley cage

• SGS Long

Material

• Aluminium
• GFRP
• Stainless steel
• Steel

Weight

• Approx. 240 g

Contents

• 1 x Shimano XTR 12-Speed Rear Derailleur RD-M9100

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Weights are based off pre-production products at time of publication. Weights may vary in final production.