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Featuring beefy hollow-forged crank arms and a massive 30-millimeter Praxis™ M-30 spindle cold-forged from 7075 aluminum and precision ground to extremely tight tolerances, the Box One™ M30-M Crankset is the absolute stiffest junior BMX crankset available today. A precision CNC-machined chromoly/alloy self-extracting crank bolt system makes installation and removal a snap.

Each crankset includes a Praxis™ M30-BSA Threaded Bottom Bracket that is compatible with all European style bottom brackets. BB86 or BB30/PF30 compatible adapters can be purchased separately from Praxis™.

Material7075-T6 Aluminum
Length145, 150, or 155mm
FinishMatte black w/ laser-etched graphics
Q Factor153mm


  • Praxis™ External BSA Bottom Bracket
  • M30 BB installation tool

Box One Oversized M30-M Crankset

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