SQUARE TAPER BOTTOM BRACKET

If install with WHITE INDUSTRIES SQUARE TAPER ROAD CRANKS in Brompton, recommend BB SPINDLE LENGTH 113mm.

The White Industries Square Taper Bottom Bracket is where story began. Originally introduced in 1988, it was one of the very first products ever manufactured. More than three decades later, it remains a trusted favorite thanks to its smooth performance, exceptional durability, and timeless design.

Every Square Taper Bottom Bracket is precision CNC-machined, polished, engraved, and assembled in Petaluma, California facility. As a result, it delivers the premium craftsmanship and long-lasting reliability riders have come to expect from White Industries.

While drivetrain technology has continued to evolve, the square taper interface has earned its reputation for simplicity, strength, and dependability. Whether you’re restoring a classic bicycle, maintaining a touring bike, or building a modern steel frame, the White Industries Square Taper Bottom Bracket provides years of smooth, trouble-free performance.

Designed for BSA threaded frames, this bottom bracket features a J.I.S. (Japanese Industrial Standard) square taper spindle. It is fully compatible with White Industries ENO Square Taper and Road Square Taper cranks, as well as many cranksets from Shimano, Sugino, and other manufacturers that use the J.I.S. taper standard.

Please note that this bottom bracket is not compatible with Campagnolo (ISO) square taper cranksets, which use a different spindle interface.

Whether you’re preserving a classic ride or building a dependable everyday bicycle, the White Industries Square Taper Bottom Bracket combines proven engineering, precision machining, and American-made quality that stands the test of time.

Made in USA

Features

• One of the original White Industries products, first introduced in 1988
• Precision machined in Petaluma, California
• Designed for BSA threaded bottom bracket shells
• J.I.S. square taper spindle interface
• Compatible with White Industries ENO Square Taper and Road Square Taper cranks
• Compatible with Shimano, Sugino, and other J.I.S. square taper cranksets
• Not compatible with Campagnolo (ISO) square taper cranksets
• Smooth, durable, and fully serviceable design
• Precision machine-engraved White Industries logos

Specs.

• 1.37” x 24 TPI threads
• Compatible with 68mm or 73mm bottom bracket shells (spindles are specific to shell width)
• Spindle has “shoulders” machined into it to which the bearings seat against
• “Symmetric” design with equal length on both sides
  / Not laterally adjustable
• Bearing preload set via the adjustable non-drive side cup and lockring
• Thread depth: 12.4mm
• Options include:
  • Stainless steel or Titanium spindles
  • 108mm, 113mm, or 121mm spindle lengths
  • 68mm and 73mm bottom bracket shell widths
  • 108mm spindles not available for 73mm BB shell widths
• Bearings
  • 2x Enduro ABEC 5 61903 LLB steel radial bearings
  • There are no “external” seals on this bottom bracket, only the seals built into the bearings
• Weights
  • 108mm: 207g/SS and 142g /Ti
  • 113mm: 214g/SS and 149g/Ti
  • 121mm: 227g/SS and 156g/Ti
• Internal BB sleeve part #BBSLV17 available under Bottom Bracket Sleeves
  • Helps keep debris from getting to the insides of the bottom bracket bearings

Compatibility

• Designed to be used on threaded BSA 68mm or 73mm wide bottom bracket shells (spindles are specific to shell width)
• J.I.S. (Japanese Industrial Standard) crank tapers
  • Not compatible with Campy cranks which use an ISO or “Campy” style taper
• Note! Titanium spindles flex more than stainless steel spindles and may require shorter service intervals to prevent creaking, especially for riders over 180lbs
• Internal BB sleeve part #BBSLV17 available under Bottom Bracket Sleeves

What's In The Box

1. Non-drive side adjustable cup with lockring, bearing installed
2. Drive-side fixed cup, bearing installed
3. Stainless steel or titanium spindle
4. Sleeve not included (not currently available)
   BB sleeve part #BBSLV17 available under Bottom Bracket Sleeves