Box Two External Bottom Bracket



The Box Two external bottom bracket is a great, high quality BB set for BMX racing cranks that use an outboard BB.

  • Includes sealed cartridge bearings
  • To suit 24mm spindles only
  • For use with euro (threaded) bottom brackets only
  • 6061-T6 Aluminium Shell
  • 68/73mm Spindle
  • 24mm Thread 1.37 Inch x 24 TPI (English)
  • Weight: 105 grams