SRAM SX Eagle Rear Derailleur – 12 Speed Long Cage Aluminum Black B1

SX Eagle Rear Derailleur: Entry-Level Performance Meets Pro-Grade Reliability

The SRAM SX Eagle derailleur is designed to deliver rugged performance for riders exploring the world of single-chainring drivetrains. Engineered as an accessible gateway into the SRAM Eagle ecosystem, this derailleur seamlessly integrates with SRAM’s 12-speed Eagle Colorsystem components, ensuring compatibility across a wide range of setups. Whether you’re running an 11-50t or 10-50t cassette, its advanced X-HORIZON architecture provides smooth transitions between gears and unwavering reliability on even the most demanding trails.

At its core lies SRAM’s X-SYNC pulley technology, which minimizes chain slippage and noise while maximizing efficiency—ideal for technical climbs or high-speed descents where precise power transfer matters most. The SX Eagle’s long cage design offers a generous 40-tooth wrap capacity, accommodating larger 50t cogs to give you the low-end torque needed for steep inclines or rough terrain. Built for durability, this derailleur withstands the rigors of all-day adventures without compromising on smooth shifting performance.

For riders new to trail mechanics, the SX Eagle’s Cage Lock feature simplifies on-the-fly wheel removal—perfect for quick chain adjustments or post-crash repairs without tools. Its lightweight frame and robust construction make it a go-to choice for entry-level mountain bikes seeking a balance between affordability and capability. Whether you’re tackling weekend trails or multi-day expeditions, this derailleur ensures consistent operation in wet, muddy conditions thanks to its sealed bearings and corrosion-resistant finish.

Why Choose SX Eagle?
– Versatile Compatibility: Works with all SRAM X-Actuation shifters and Eagle Colorsystem components
– Wide Range Capability: Supports 10-50t and 11-50t cassettes for aggressive terrain
– Tool-Free Convenience: Cage Lock enables easy trailside wheel swaps
– Quiet & Efficient: X-SYNC pulleys reduce noise while improving chain retention

Perfect for trail riders on a budget or those upgrading from older systems, the SX Eagle combines proven SRAM engineering with practical features that enhance every ride—whether you’re mastering your first technical trail or pushing deeper into uncharted backcountry routes.