Box One Prime 9 Derailleur (Black) (9 Speed) (X-Wide Cage) (Clutch)

While everyone else keeps adding more and more gears, the Box One Prime 9 Groupset takes a different approach. The engineers at Box decided that sometimes simple is better so they developed a groupset with a wide ratio range over only 9 cogs. The benefit is that fewer gears reduce the chain angle on the low end; making the chainline more direct across the whole range; improving component longevity and power transfer. The rear derailleur boasts a limited-slip clutch with instant engagement and constant torque which prevents dropped chains and minimizes chain slap.

Features:

• Prime 9 Technology for less derailleur travel and better chainline, less wear, and improved lifespan
• Adjustable Tri-Pack
• Limited slip clutch
• Forged inner and outer cage
• Pivot-Tech cable stay
• Sealed bearing pulleys
• 3D forged linkages
• Not compatible with Shimano direct mount derailleur hangers (requires traditional derailleur hanger)

Specifications:
Speed: 9 Speed
Shifter Compatibility: Box Prime 9
Shift Mechanism: Cable Actuated
Max. Tooth: 50T (X-Wide Cage)
Min. Tooth: 11T
Chain Wrap Capacity: 39T
Cage Material: Forged Steel
Chain Retention: Clutch
Color: Black
Weight: 290g (X-Wide Cage)