Rear Derailleur
Shimano XT RD-M8100-SGS
12-speed Hyperglide+ clutch, 51T max cog
$113.00 best current price across tracked retailers
What this fits
- Speeds
- 12
- must match your bike
- Max cog
- 51T
- must reach what your bike needs
- Wrap capacity
- 41T
- must reach what your bike needs
- Cage
- Long
- must match your bike
- Cable pull
- Shimano Mountain
- must match your bike
- Mount
- 10x1 Standard
- must match, or use an adapter
Mixing speed counts across shifter, derailleur, chain and cassette is the most common upgrade mistake — check every part in the drivetrain, not just this one.
Intended for mtb builds.
Manufacturer specifications
- Cage Length
- Long
- Chain Wrap Capacity (teeth)
- 41
- Color
- Black
- Drivetrain Speeds
- 12
- Largest Cog
- 51
- Rear Der/Shifter Compatibility
- Shimano Mountain
- Rear Derailleur Mount Type
- 10x1 Standard
- Weight
- 284
Specifications recorded from the retailer product listing.
Where to buy
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