Description
SRAM SX Eagle 12-Speed Rear Derailleur
Elevate your mountain bike drivetrain with the SRAM SX Eagle 12-Speed Rear Derailleur, your affordable entry point into the legendary SRAM Eagle ecosystem for trail riders, beginners, and upgrade enthusiasts craving wide-range 1x performance. Sharing proven technologies like the 1x-specific X-HORIZON parallelogram design for precise, ghost-shift-free operation, it handles massive 50T cassettes (11-50T or 10-50T) with quiet consistency and durability. Featuring steel cage construction, X-SYNC pulleys for enhanced efficiency and reduced noise, Type-3 roller bearing clutch for chain stability, and Cage Lock for effortless wheel removal, it’s fully cross-compatible with higher-tier Eagle components (NX, GX, X01, XX1) for easy future upgrades. Rugged, reliable, and built for real trails— this derailleur delivers Eagle performance without the premium cost.
Key Features
- X-HORIZON Design → Straight parallelogram limits movement to horizontal axis, eliminating ghost shifting and reducing shift force for quicker, exact performance.
- X-SYNC Pulley Technology → Narrow-wide pulleys provide greater efficiency, crisper shifting, and quieter chain operation across the cassette.
- Cage Lock Technology → Locks the cage forward for faster, simpler wheel removal, installation, and chain maintenance—ideal for trailside fixes.
- Type-3 Roller Bearing Clutch → Keeps chain tension consistent on rough terrain, minimizing slap and drops.
- Full Eagle Ecosystem Compatibility → Works seamlessly with other Eagle derailleurs, shifters, cassettes, and chains for personalized upgrades over time.
- Durable Steel Construction → Long cage and steel materials ensure toughness for demanding MTB use.
Specifications Table
| Specification | Details |
|---|---|
| Brand | SRAM |
| Model ID | RD-SX-1-B1 |
| Speeds | 12 |
| Cable Pull Ratio | X-ACTUATION |
| Cage Length | Long |
| Max Tooth | 50T |
| Color | Black |
| Pulley Bearings | Steel |
| Cage Material | Steel |
| Weight | ≈336g |
| Drivetrain | 1×12 (Eagle) |
Compatible Bikes
This rear derailleur integrates perfectly with 1×12 Eagle drivetrains on modern mountain bikes, including:
- Cross-Country (XC) Bikes → Precise shifting for efficient racing and climbing.
- Trail Bikes → Reliable chain management on technical, bumpy terrain.
- All-Mountain/Enduro Bikes → Handles big cassettes for steep descents and granny-gear climbs.
- E-MTBs → Compatible with pedal-assist systems and robust frames.
- Hardtails → Affordable upgrade for wide-range gearing on budget builds.
Requires standard derailleur hanger; compatible with 10-50T/11-50T Eagle cassettes and HG freehubs. In a world of evolving trails and growing skills, the SRAM SX Eagle Rear Derailleur stands out as your smart, scalable foundation for Eagle excellence. Imagine smooth, silent shifts through rocky sections or punchy ascents—this entry-level gem brings pro features to every rider. Backed by SRAM’s drivetrain innovation, it’s engineered for durability and easy progression to higher tiers. Start your Eagle journey today and shift with confidence.
There are no reviews yet.