White Industries External BSA Bottom Brackets

White Industries External BSA Bottom Bracket

*See note at bottom regarding 29mm.

White Industries external BSA style bottom brackets are made here in our shop and feature Enduro stainless steel angular contact bearings or optional Enduro XD-15 ceramic-hybrid radial bearings.  We offer them with three different bearing sizes to help you fit your favorite crank to your favorite bike.

“BSA” bottom bracket shells and cups are named after the Birmingham Small Arms Company which created the thread standard used in this system.  It’s also referred to as “British” or “English” style and is the most common type of system found on modern bicycles.  The “external” designation refers to the fact that the bearings will sit outboard of your frame’s bottom bracket shell as opposed to being tucked inside the shell as you would find on some styles of BSA bottom brackets.

• 1.37” x 24 TPI threads (“BSA” threads)
• Designed to be used on 68mm or 73mm wide bottom bracket shells
• Enduro stainless steel angular contact bearings
  • Enduro XD15 ceramic-hybrid bearings optional
• Weight/pr (with bearings and seals)
  • 30mm: 83g
  • 29mm: 90g
  • 24mm: 84g
• Cup widths (external section of each cup, including seal)
  • 24mm: 10.5mm
  • 29mm: 11.5mm
  • 30mm: 11.5mm
• Thread depths
  • 24mm: 11mm
  • 29mm: 13mm
  • 30mm: 13mm
• Bearings
  • 24mm: Enduro SMRA 2437 LLB or CXD MR 2437 LLB
  • 29mm: Enduro S71806/29 LLB or CXD 6806/29 LLB
  • 30mm: Enduro S71806 LLB or CXD 6806 LLB
• Torque: 26-37 ft lbs (35-50 Nm)
• Tools: 12 notch/46mm
  • Park BBT-79 to BBT-79.3
  • Abbey BSA30
  • Enduro BBT-015
  • Race Face Cinch spanner
• Anodized with machine engraved logos
• Available in black, blue, gold, pink, purple, polished silver, red

*SRAM DUB spacers will not work with our 29mm BB’s. You will need a 29mm Spindle Spacer Kit