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Shimano Deore RD-M5120-SGS Rear Derailleur, a versatile long-cage component designed for mountain biking on rough terrain. It is part of Shimano's Deore M5100/M4100 series and is notable for its broad compatibility with both 10-speed and 11-speed drivetrains.
Rear Speeds: Compatible with 10-speed and 11-speed systems.
Total Capacity: 41T (the maximum combined difference between chainrings and cassette teeth the derailleur can manage).
Max Front Difference: 10T (supports double chainring setups with up to a 10-tooth gap).
The maximum low sprocket (largest cog) depends on your drivetrain configuration:
1x10 or 1x11 Setups: Supports a maximum cog size of 46T.
2x10 or 2x11 Setups: Supports a maximum cog size of 42T.