Distilling a decade of Eagle dominance, the SRAM Eagle S100 RD-S100-B1 Rear Derailleur is a thoroughly modernized derailleur featuring a re-engineered bushing architecture that eliminates slop to guarantee long-term, factory-fresh precision. Unflinchingly accurate and built to command a massive 500% gear range, this derailleur is engineered to shrug off heavy, high-torque abuse, delivering relentless, reliable shifting for any rider, in any condition..
SRAM Eagle S100 Rear Derailleur
12-speed - 1x12s
RD-S100-B1
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Features:
- Mounting bolt is Half Mount ready. Pair with a UDH and Half Mount plate for increased derailleur hanger security
- Utilizes proven Drag Spring cage damper for confident chain retention
- Max 500-percent range for pairing with the SRAM PG1210 cassette
- X-Actuation for use with Eagle Drivetrain shifters
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Specifications:
| Speed (RD) | 12 |
|---|---|
| Cable pull ratio | X-Actuation |
| Cage (RD) | Long |
| Max tooth | 50 |
| Color (RD) | n/a |
| Pulley bearings material | Steel |
| Cage material (RD) | Steel |
| Drivetrain Configuration | 1x |
| RD Minimum (Cassette) | 50 |
| Communication Protocol | n/a |
| Shift Technology | X-Actuation |
| Chain Technology | Eagle |
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Our thoughts:
The SRAM Eagle S-Series represents the definitive evolution of the legacy Eagle and AXS platforms, distilling them into three distinct, purpose-built tiers: S100, S200, and S500. The result is a radically simplified, seamlessly cross-compatible drivetrain ecosystem designed to give you the ultimate freedom to mix and match.
SRAM eliminated the guesswork from your build. This strategic consolidation empowers you to instantly identify the perfect upgrade or replacement, whether you are breathing new life into an older chassis, refreshing a worn-out race rig, or dialing in the exact performance tier your riding demands.
To guarantee absolute precision in your component selection, utilize the intuitive replacement matrix. It provides a direct, foolproof roadmap showing exactly which S-Series parts seamlessly upgrade your existing Eagle hardware, allowing you to build and ride with total confidence.
