Brand new in box
2nd image shows the D type mount chain device highlighted in red that you are buying
Enduro pilots, who also predominantly start on 1-speed systems, can supplement their setup with a newly developed Shimano SM-CD800 chain device (D-Type assembly) and thus further optimise the already excellent grip of the chain on the DYNAMIC CHAIN ENGEGEMENT PLUS chainrings
Features - Shimano SM-CD800
Ensure stable drivetrain
Optimized plate design for new generation chain
Easy adjustment by screw
Lightweight
Mount: D-Type
Product features
Use: MTB
Group: XTR M9100
Suitable for: FC-M9100-1 and FC-M9120-1 (1-speed)
Top gear teeth: 30 / 32 / 34 / 36 / 38T
Chain compatibility: CN-M9100 12-speed
Chainline: 52mm
Assumed rear sprocket teeth: 10-45T, 10-51T
Chain stay angle: 63°-75°