Box One M35 Crankset

Box One M35 Crankset

Product Overview

The Box One M35 is the world's first BMX crankset featuring a Praxis 35mm external bottom bracket system. Engineered for elite racing with hollow forged 7075 aluminum crank arms and a massive 35mm cold-forged spindle, it delivers maximum stiffness and precision. Compatible exclusively with BB30/PF30 bottom bracket shells.

Key Features

• Praxis 35mm External Bottom Bracket – Industry-first BMX system; 35mm spindle diameter provides unprecedented stiffness
• Hollow Forged 7075 Aluminum Crank Arms – Lightweight yet incredibly rigid construction optimized for racing
• Cold-Forged 7075 Aluminum Spindle – 35mm diameter spindle resists deflection and maintains precision through extreme racing loads
• Maximum Stiffness – Claimed to be the absolute stiffest BMX race crankset available
• Precision CNC-Machined Chromoly/Alloy Self-Extracting Bolt System – Simplifies installation and removal without special tools
• 104mm BCD – Compatible with standard BMX chainrings for drivetrain flexibility
• 168mm Q-Factor – Optimized crank spacing for efficient power transfer and pedaling position
• Laser-Etched Graphics – Durable branding without added weight
• Included Bottom Bracket – Praxis M35 external BB with precision Enduro bearings included
• Installation Tools – Two M35 BB installation tools included for proper assembly
• Professional Racing Design – Engineered for elite BMX racers demanding maximum performance
• Lightweight Construction – 739g (175mm length) for racing-focused builds

Technical Specifications

• Material: 7075-T6 aluminum (crank arms and spindle)
• Bottom bracket: Praxis M35 external (BB30/PF30 compatible)
• Spindle diameter: 35mm
• BCD: 104mm
• Q-factor: 168mm
• Crank type: 2-piece crankset
• Shell compatibility: PF30 or BB30 only
• Weight: 739g (26.1 oz) at 175mm length
• Finish: Laser-etched graphics
• Included components:
  • Praxis M35 external bottom bracket with precision Enduro bearings
  • Two M35 BB installation tools
• Self-extracting crank bolt system: Chromoly/alloy construction

Compatibility & Ideal Use Cases

• BB30/PF30 Bottom Bracket Shells – Exclusive compatibility with modern BB30 or PF30 frame shells
• Professional BMX Racing – Elite-grade component engineered for competitive racing
• Maximum Stiffness Applications – Demands for absolute crank rigidity and precision
• 104mm BCD Chainrings – Compatible with standard BMX chainrings for drivetrain options
• Elite Racers – Purpose-built for professional and national-level BMX competitors
• Precision-Focused Builds – For riders demanding maximum performance and stiffness
• Modern Frame Geometry – Fits contemporary BMX racing frames with BB30/PF30 shells

Build Requirements & Compatibility

• BB30 or PF30 Frame Shell – Frame MUST have BB30 or PF30 bottom bracket shell; incompatible with all other BB types
• 104mm BCD Chainring – Select 104mm BCD 4-bolt chainring for drivetrain (sold separately)
• Pedals – Standard BMX pedals compatible with crank arms
• Installation Tools – Two M35 BB installation tools included; no additional tools required for BB installation
• Drive-Side Seal – Drive-side bottom bracket seal not included; purchase separately if needed

Important Compatibility Notes

• INCOMPATIBLE with:
  • BSA (Euro) bottom bracket shells
  • BB86 bottom bracket shells
  • BB90 bottom bracket shells
  • T47 bottom bracket shells
• Frame verification is CRITICAL; M35 will NOT fit any bottom bracket shell except BB30/PF30
• Verify your frame specification before ordering; incompatible installation will not work

Important Notes

• Ships direct from manufacturer in USA; may ship separately from other orders
• World's first 35mm external bottom bracket BMX crankset
• 35mm spindle diameter provides maximum stiffness for elite racing
• Hollow forged construction minimizes weight while maximizing rigidity
• Q-factor 168mm optimized for efficient power transfer and comfort
• Self-extracting bolt system simplifies installation and crank removal
• Praxis M35 external BB with Enduro bearings included; no additional BB purchase required
• Two M35 BB installation tools included for proper assembly
• Drive-side seal not included; purchase separately if needed
• Laser-etched graphics provide durable branding without weight penalty
• Professional-grade component for elite BMX racers
• 739g weight (175mm) competitive despite extreme stiffness
• Precision engineering and cold-forging process ensure consistency
• BB30/PF30 compatibility exclusive; NOT compatible with traditional BSA or other BB standards
• Elite-level performance and precision justify professional-grade pricing