A threaded bottom bracket that offers bearings with ...
extremely low friction, improved power transfer, and a service life that far exceeds traditional steel bearings. Features: Grade 3 Silicon Nitride balls Coated races increase bearing service life by increasing hardness of ...
Interloc Racing Design QB55 JIS Bottom Bracket. Features: ...
High quality sealed cartridge bearings with steel cups Traditional square JIS 2-degree taper crank-arm interface 68/73mm English (1.37" x 24 tpi - RH/LH) Made in Japan Specifications: Frame Interface: BSA/English Threaded Spindle ...