Shimano XT RD-M8100-SGS Rear Derailleur
Shimano XT RD-M8100-SGS Rear Derailleur
The Shimano XT RD-M8100-SGS Rear Derailleur is a high-performance 12-speed long-cage derailleur designed for riders who push their gear hard across technical terrain. Built for the XT M8100 series, it delivers fast, precise shifting, superior chain control and compatibility with wide-range cassettes.
Features
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12-speed compatibility, designed for modern MTB 1× systems
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Long-cage (SGS) configuration for wide-range 10-51T or 10-45T cassettes
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SHIMANO SHADOW RD+ low-profile design for reduced impact risk and improved clearance
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Larger 13-tooth pulleys for smoother chain movement and better efficiency
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Bump-stopper on the pulley cage to suppress chain slap and reduce noise on rough terrain
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Low-profile, durable construction optimized for demanding trails and all-mountain use
Why It Matters
When your build needs serious capability—whether for enduro, all-mountain, or aggressive trail rides—the RD-M8100-SGS steps up. Its wide gear-range support, advanced chain control features and rugged design mean fewer compromises, more confidence in shifting, and better performance mile after mile.
Ideal For
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Mountain bikes using 12-speed Shimano XT M8100 drive-trains
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Riders upgrading from narrower gear ranges to a 10-51T wide-range cassette
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Builds that demand long-cage compatibility for big front-ring differences or mixed terrain
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Anyone looking for reliable, high-precision shifting and chain stability on rough terrain
Upgrade your drivetrain with the Shimano XT RD-M8100-SGS Rear Derailleur and ride with smoother shifts, wider gearing and peace of mind.
