Two black circular Box ONE Bottom Bracket B52 35mm mechanical seals with white labeling shown at an angle against a white background—perfect for enhancing power transfer in compatible bike systems.
Two black, cylindrical metal components with threaded exteriors—Box ONE Bottom Bracket B52 35mm—are shown from different angles on a white background, designed for enhanced bike power transfer using Oversized Technology.
A black circular BMX hub guard with white text and branding, made to complement the Box ONE Bottom Bracket B52 35mm for enhanced bike power transfer.
Two black, cylindrical threaded metal components—the Box ONE Bottom Bracket B52 35mm with Oversized Technology—are shown side by side against a white background, designed to enhance bike power transfer.

Description

BOX couldn’t ignore the truth about bottom brackets.
Traditional BBs lack the space needed for the stiffness and responsiveness modern riders demand. That’s why they developed the BOX B52 Bottom Bracket — bringing their signature Oversized Technology into your frame and breaking new ground in the bike builder’s world.

With a 52mm diameter and 80mm wide shell, the B52 allows for wider chainstays, boosting stiffness and enhancing efficiency through corners and sprints. Power transfer becomes more direct, feedback more immediate — you’ll go further, faster, with less energy wasted.

This is Oversized, the BOX way.
Stack as many Oversized components as possible and eliminate flex from your setup. The result? A faster, sharper, more responsive ride — built to BOX standards.

Features
  • 52mm oversized shell. The B52 runs a 52mm diameter, giving your frame the room traditional bottom brackets do not have.
  • 80mm wide shell. An 80mm wide shell allows for wider chainstays, which boosts stiffness through corners and sprints.
  • Direct power transfer. With less flex in the setup, more of what you put through the pedals goes into the ground.
  • Built for 35mm spindles. This is the 35mm version, made to pair with the BOX M35 cranks.
  • Part of the Oversized system. Stack it with other BOX Oversized components for a sharper, more responsive ride.

Specifications
  • Fits: 52mm diameter, 80mm wide bottom bracket shells
  • Spindle size: 35mm
  • Note: Designed to run with BOX M35 cranks.

Box ONE Bottom Bracket B52 35mm

Brand: BOX Components SKU:

$169.99 AUD

Or 4 payments of $42.49 AUD with

Colour - Black

BB Type - B52

Spindle Size - M35 (35mm-33mm)

$169.99 AUD

Price match request

Box ONE Bottom Bracket B52 35mm - Black / B52 / M35 (35mm-33mm)

$12.99 flat-rate shipping Australia-wide

Express from $21.99

Free in-store pickup - Brisbane

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