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

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Price: $74.99
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While everyone else keeps adding more and more gears, the Box Three 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.


  • Prime 9 Technology for less derailleur travel and better chainline, less wear, and improved lifespan
  • Limited Slip Clutch 
  • Stamped front/rear cage 
  • Direct channel cable stay
  • Bearing pulleys

Max Cog: 50T
Cage Length: Long
Cage Width: X-Wide
Derailleur/Shift Compatibility: Box Prime 9
Color: Black
Weight: 349g

This product was added to our catalog on November 10, 2020

Box Prime 9 Model Comparison