Box Three Prime 9 X-Wide Groupset (9 Speed) (Single Shift) (12-50T)

Box Three Prime 9 X-Wide Groupset (9 Speed) (Single Shift) (12-50T)
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Price: $214.99

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While most companies now days are expanding their drivetrains upwards of 13 speeds, Box believes that more is not necessarily better. The Idea behind the 9-speed drivetrain is to keep things simple while receiving the same gear range in a more efficient package; resulting in less shifting error, which produces a more user friendly experience.


  • Wide range 9 speed single-shift group for use with e-bikes
  • Simple durable performance without all the bells and whistles
  • Includes E-bike optimized 12-50t cassette, rear derailleur, shifter and chain
  • Single shift per swing for E-Bike safe shifting
  • Wide ratio with consistent progression
  • Glass fiber / nylon composite, steel and aluminum construction


  • Cassette (12-50T)
  • Rear Derailleur 
  • Shifter
  • Chain

Cassette Body Type: Shimano/SRAM (Not Compatible with XD or MicroSpline)
Rear Derailleur Speeds: 9-Speed
Rear Derailleur Max Cog: 50T
Rear Derailleur/Shift Compatibility: Box Prime 9
Shifter Style: Thumb
Shifter Speeds: 9-Speed Single-Shift
Color: Black

This product was added to our catalog on June 1, 2021