Box One M30-M Crankset - boxcomponents
Box One M30-M Crankset - boxcomponents
Box One M30-M Crankset - boxcomponents

Box One M30-M Crankset

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Featuring oversized 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, Box Two™ M30-M cranks fit frames with European bottom brackets, paired with the same oversized, hollow-forged arms and 104 BCD spider with a flex-resistant ring as our Box One™ M35 cranks.

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

  • Oversized Technology™ Hollow Forged Design
  • Oversized 30mm Alloy Spindle
  • Self-Extracting Crank Bolt System
  • Top-Load Clamp Design
  • 4-bolt 104 BCD Spider
  • External BSA 30mm BB Included
  • Box Two Chainring
  • Box One Chromoly Chainring Bolts
  • Box One 7075 Alloy Chainring Bolts
  • Box Two Oversized bottom bracket M30
For compatibility questions, please click here

No. These cranks are designed to not use pedal washers. Installing pedal washers can damage the crank as the pedal will not be threaded in sufficiently.

Yes, but you will need a BB86 conversion bottom bracket available from Praxis Cycle Works.

The cranks are designed to specifically for 68mm wide BMX bottom bracket shells and require no spacers. Spacers may be required if your frame has a bottom bracket shell that is less than 68mm wide.

No. A chainring can only be installed on the inside of the spider.

No. A loose pedal will damage the crank and can cause injury. Always ensure that your pedals are tightened correctly.

  • BB86 frames require Praxis™ part 86-4001B.
  • BB30/PF30 frames require Praxis™ part 68-4001R or 68-5401R.
  • T47 frames require Praxis™ part 47-0000.
  • Do not use pedal washers when installing pedals onto these cranks. M30-M cranks were designed to be used without pedal washers.

    145mm 150mm 155mm
    BB (Included) BSA 30mm 1.37 BSA 30mm 1.37 BSA 30mm 1.37
    Spindle 30mm Alloy 30mm Alloy 30mm Alloy
    Material 7075 T-6 Aluminum 7075 T-6 Aluminum 7075 T-6 Aluminum
    Process Hollow-Forged Hollow-Forged Hollow-Forged
    Chainline 44.5mm 44.5mm 44.5mm
    Q Factor 153mm 153mm 153mm
    Weight 498g/17.6oz 509g/17.9oz 518g/18.3oz

    Due to the complexity of hollow-forged manufacturing, the weights may vary +/- 10%