Rear Derailleur
Shimano Deore RD-M5100-SGS
11-speed Shadow RD+ clutch, long cage, 51T max cog
$52.49 best current price across tracked retailers
What this fits
11-speed drivetrains. Mixing speed counts across shifter, derailleur, chain and cassette is the most common upgrade mistake — check every part in the chain, not just this one.
Requires a Shimano HG freehub body. A freehub standard cannot be adapted — the wheel either has it or it does not.
Intended for mtb, gravel builds.
Manufacturer specifications
- Cage Length
- Long
- Color
- Black
- Drivetrain Speeds
- 11
- Largest Cog
- 51
- Rear Der/Shifter Compatibility
- Shimano DynaSys11
- Rear Derailleur Mount Type
- 10x1 Standard
Specifications recorded from the retailer product listing.
Where to buy
Prices were last checked when the catalog was built and can change at any time. Links are affiliate links; we may earn a commission at no extra cost to you.