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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All Box One and Two cranksets are engineered and crafted using our Oversized Technology. we all know that there is no use pushing hard on your pedals if you can’t deliver most of that power to the rear wheel. During the creation of our cranks, we were obsessed with Power delivery AKA pedaling stiffness. To reduce lateral deflection at the bottom bracket we chose to enlarge the spindle and the crank arm’s interfaces. We robbed material from unloaded sections to reinforce these zones of high stress. Not only are you going to be more efficient with power delivery, but you’ll also feel the instant response of acceleration. Seen through another lens, less energy will be required to achieve the same elapsed time.

Key differences: The Box One M30 crankset is just as tyrannical as its big brother the Box One M35. Since it's designed for the smaller rider the now 30mm spindle is as extreme to a smaller rider as the 35mm is to a burly world champion. The crank arms are hollow-forged but reduced in size for their application. It is possible to add too much stiffness where the rider will not feel the benefits. Going beyond that point simply adds material which is surplus weight. We’ve removed the stabilizer rings from the spider and removed unneeded material from its legs. These cranks are engineered for the smaller-sized racers.

  • 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%