The Shimano SM-CD800-I chain guide embodies the technical excellence of the XTR M9100 range, designed for demanding enduro and XC riders who favor single chainring 12-speed drivetrains. With its ISCG05 mounting, this chain retention device guarantees optimal drivetrain stability on the most technical and rough terrain.

Technical Highlights

• Maximum drivetrain stability: Specifically designed to keep the chain perfectly in place on the front chainring, even during violent rocky passages or brutal landings.
• Optimized design for new generation chains: Redesigned guide plate to perfectly match CN-M9100 12-speed chains and Shimano's Dynamic Chain Engagement+ chainrings.
• Simplified screw adjustment: Ultra-easy vertical adjustment and height positioning of the guide thanks to an accessible screw system, without complex specific tools.
• Lightweight and robust: Only 33 grams thanks to an intelligent hybrid construction combining an aluminum back plate and an ultra-resistant technical resin guide.
• Targeted compatibility: Developed exclusively for Shimano XTR FC-M9100-1 and FC-M9120-1 single chainring cranksets with 52 mm chainline.

Compatibility and Specifications

The SM-CD800-I installs directly on the ISCG05 mounting points present on the frame. It is compatible with chainrings from 30 to 38 teeth and works with 10-45T or 10-51T rear cassettes. The optimal rear base angle is between 63° and 75°. This low-profile chain guide ensures reliable and consistent performance, particularly appreciated in competition and on technical singletrack.

Available Variants

The SM-CD800 range comes in three versions to adapt to all mounting standards:

• SM-CD800-D (Direct Mount): EAN 4524667880295 — Direct mounting on front derailleur location, fully resin construction, weight 28 g.
• SM-CD800-E (E-Type): EAN 4524667880301 — Mounting on frame E-Type support or on plate attached to bottom bracket, resin construction.
• SM-CD800-I (ISCG05): EAN 4524667880288 — Version presented here, ISCG05 mounting, aluminum plate + resin guide, weight 33 g.

Each variant shares the same design philosophy and the same high performance, only the mounting method differs according to your frame configuration.

Performance in Extreme Conditions

Developed to meet the requirements of top-level riders, the SM-CD800-I effectively prevents derailments and chain drops in critical moments: technical obstacles, violent compressions, explosive accelerations after rough sections. Its discreet profile adds virtually no weight while offering unmatched security. An essential component to transform your single chainring drivetrain into an ultra-reliable system, worthy of XC, enduro and marathon podiums.