Ask a Question

If you have a question about this product, want to know more information or just have a general question please fill out the form below and let us know what you are looking at, and what you would like to know. Alternatively you can call us on 01942 826598 if it is urgent.


Box One Oversized M35 Race Crankset

Brand: Box




Ask a Question

Brand: Box

All Box One M35 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 pedalling 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.

The Box One M35 crankset takes the oversized spindle action to an extreme with a colossal 35mm diameter cross-section courtesy of Praxis™. That dimension might seem massive, but we’ve also employed the use of cold-forged 7075 T6 aluminium. That's an alloy that delivers low mass but that also flirts with the toughness of steel. We then grind that spindle with the kind exactitude you’d expect from medical equipment. The very prominent crank arms are hollow-forged with much of the wall thicknesses pushed to high-stress zones. A stabilizer ring acts as an anti-twist brace between spider legs. A precision CNC-machined Chromoly/alloy self-extracting crank bolt system secures the package.

Remember, you’ll need a modern frame to cope with this kind of technology.


  • Oversized Technology™
  • Hollow Forged Design
  • Massive 35mm Alloy Spindle
  • Self-Extracting Crank Bolt System
  • Spider with Flex-Resistant Ring

Important notes:

Fits frames with BB30/PF30 bottom shells. M35 cranks will NOT FIT frames with BSA (Euro), BB86, BB90, or T47 bottom bracket shells.
Does NOT include a drive-side bottom bracket seal.


  • MaterialArms - Hollow-Forged & CNC 7075 T-6 Aluminium
  • SpindleCNC Turned 7075 T-6 Aluminium
  • BCD4-bolt 104 BCD
  • Chainline44.5mm
  • Q-Factor168mm
  • Bottom BracketBB30 PF30 included
  • Weight Limit115kg (253 lbs.) with limitations as per category 2 of EN 16054:2012
  • ColourBlack Anodised w/Laser-Etched Graphics