The Box One B52 Bottom Bracket ditches the cramped confines of traditional designs with its beefy 52mm x 80mm shell. This oversized powerhouse delivers stiffer pedal response and wider chainstays that transform your cornering and acceleration into a more efficient affair. Feel the difference in power delivery and responsiveness as your bike becomes noticeably more rigid. Stack it with other oversized components to eliminate flex and squeeze every ounce of performance from your frame. Less effort, same speed—that's the B52 promise.
Key differences: By advancing the boundaries of the BB shell to 52mm, we can encase the bearings for improved durability. With enhanced support, bearings handle high torque with fewer complaints, reducing shaft wobble due to minimal internal clearance. This leads to improved power delivery, enhanced concentricity, longer service life, reduced vibration, and limited axial motion.
Features
- Oversized Technology™
- 80mm shell allows wider chainstays, minimising rear triangle deflection.
- Captured bearings in the 52mm cup manage higher torque loads and ensure smooth spindle rotation.
- Optimised for Box M35 spindles and cranks to maximise power delivery to the ground.