The BB4129SR is a lightweight and durable press fit bottom bracket designed for BB86 / BB89.5 / BB92 frames (Ø41mm) and SRAM DUB cranksets (28.99mm spindle). It features Premium bearings, a waterproof plastic center sleeve, and TOKEN’s patented Fusion Construction to reduce creaking and improve frame fit.

Enhanced with X-Seal technology, this bottom bracket offers excellent protection against water and dirt while maintaining low friction. At just 68 grams, it’s a reliable upgrade for riders seeking smooth, quiet, and long-lasting performance.

Specifications
Frame Type: BB86 / BB89.5 / BB92 (dia. 41×86.5/89.5/92)
Crank Type: SRAM DUB (dia. 28.99)
Bearing Type: Premium
Colours: Black
Product Code: BB4129SR

Mfr Claimed Weight
68 g/set