9.5 average score from 23 reviews

BottomThread BSA

Model number: BBO-39
  • Fully CNC machined external cups
  • Co-molded bearing shields
  • Chrome steel 6805 bearings
  • Wave washers included
More information

BottomThread BSA Bottom Bracket

There is no better feeling than a smooth rolling bike. A bottom bracket is one of the most important parts to keep your bike smooth and silent. The BottomThread BSA is a high-end bottom bracket. Durable, high-end materials are used to keep your bike rolling forever!


  • Bracket Shell type BSA - English Threaded
  • Bracket spindle diameter (mm) 24
  • Bearings material CrMo
  • Bracket Shell width (mm) 68, 73mm
  • Part materials 7075 T6 Aluminium, Glassfiber reinforced Nylon
  • Weight (g) 99
  • Color name black
  • Specification code ProductBottomBrackets