Box Four Prime 9 Derailleur (Black) (8 Speed) (Wide Cage) (Clutch) - BX-DR4-08AWC-BK
Box Four Prime 9 Derailleur (Black) (8 Speed) (Wide Cage) (Clutch) - BX-DR4-08AWC-BK, While everyone else keeps adding more and more gears, the Box Four 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 8 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 Limited Slip Clutch Stamped front/rear cage Direct channel cable stay Bearing pulleys Specifications: Speeds: 8 Max Cog: 42T Cage Width: Wide Derailleur/Shift Compatibility: Box Prime 9 Color: Black Weight: 328g