Box Two Square-Taper Chromoly Bottom Bracket

Box Two™ Square Taper Chromoly Bottom Brackets are the best option for young BMX racers and other users of three-piece cranks in search of an affordable, high-performance square taper bottom bracket.

Each bottom bracket is hand-assembled with a Chromoly spindle, sealed bearings, forged and CNC-machined alloy cups, and a composite centre spacer/seal.

Specifications

  • Spindle: Chromoly
  • Cups: CNC Machined Alloy
  • Sleeve: ABS Plastic
  • Bearing: Precision Abec-5 Sealed bearings
  • Finish: Nickel Coating
  • Spindle Type: JIS Square Taper
  • Spindle Length: 108mm or 113mm
  • Shell Width: 68mm
  • Thread: 1.37" x 24 TPI
  • Compatibility: BSA Threaded
  • Torque Spec: 35-50Nm
  • Weight: [108-113] (+/- 5%): 272g/9.6 oz
Box Two Square-Taper Chromoly Bottom Bracket
Box Two Square-Taper Chromoly Bottom Bracket
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Description Colour Size Wt(g) Part No. Stock Lvl Unit RRP Pack Qty
TWO BB Set, Square Taper type - Cromo AxleBlack108mm272BBBX2CS108
ETA: April 2026
£49.99Each 
TWO BB Set, Square Taper type - Cromo AxleBlack113mm272BBBX2CS113
ETA: April 2026
£49.99Each 
  • Good stock levels
  • Low stock levels, Qtys may not be available
  • +24h Components are available, add 24/48hrs for assembly
  • Special Order Currently non-stock item, contact us for info
  • Out of stock. Expected availability date will be displayed if known.
  • Discontinued. This product is no longer available.
  • M Mixed Quantity discount available
Description Colour Size Wt(g) Part No. Stock Lvl Unit RRP Pack Qty
TWO BB Set, Square Taper type - Cromo AxleBlack108mm272BBBX2CS108
ETA: April 2026
£49.99Each 
TWO BB Set, Square Taper type - Cromo AxleBlack113mm272BBBX2CS113
ETA: April 2026
£49.99Each 
  • Good stock levels
  • Low stock levels, Qtys may not be available
  • +24h Components are available, add 24/48hrs for assembly
  • Special Order Currently non-stock item, contact us for info
  • Out of stock. Expected availability date will be displayed if known.
  • Discontinued. This product is no longer available.
  • M Mixed Quantity discount available