Bottom Brackets

Forged and CNC-machined aluminum with precision sealed bearings for 2-pc cranks and 24mm spindles BSA 1.37"x24T for 68/73mm shells

Forged and CNC-machined aluminum with precision sealed bearings for 2-pc cranks and 24mm spindles

Aluminum cups w/ steel hardware. Converts a non-threaded 68mm American BB shell to an English threaded Euro BB

Aluminum cups w/ steel hardware. Converts a non-threaded 68mm American BB shell to an English threaded Euro BB

For 19mm crank spindles and Euro bottom bracket frames. Sealed quad bearing design with alloy cups

Bottom bracket for one piece crank. Sealed mechanism. 24 tpi

Bottom bracket for one piece crank. Sealed mechanism. 24 tpi

Compatible with both American and Mid style BB shells. 6061-T6 full CNC alloy construction. Anodized surface finish

Compatible with both American and Mid style BB shells. 6061-T6 full CNC alloy construction. Anodized surface finish

Box Two External bottom brackets feature cold-forged and CNC-machined alloy cups, dual-labyrinth bearing covers and precision sealed bearings The perfect match to Box Three and Four cranks, and the ultimate upgrade to the budget BBs sold with most...

Box Two External bottom brackets feature cold-forged and CNC-machined alloy cups, dual-labyrinth bearing covers and precision sealed bearings The perfect match to Box Three and Four cranks, and the ultimate upgrade to the budget BBs sold with most...

Box Two Integrated Headsets feature an aluminum top cap, CNC-machined bearing cover, and split crown race with super-smooth rolling, precision 45x45 bearings 6061-T6 aluminum with an anodized finish with laser-etched graphics

For years, pro BMX racers have modified their bottom brackets by removing the seals and replacing the grease with oil. This results in free-spinning cranks, but also significantly shortens the life of bottom brackets. The Extremum RacePrep bottom bracket...

Featuring a hollow, custom plated, titanium spindle, precision sealed bearings, cold forged and CNC-machined cups and a carbon fiber center seal, the BOX square taper BB is the ideal upgrade for any young rider looking for an advantage.

Cups for Campagnolo Power-Torque cranksets

Adapters to replace the cups on frames with oversized bottom bracket shells. Permits the use of Ultra-Torque cranks. Don't forget the UT-BB140 required to seat them in the shell.

Except for a few, small differences in materials, the Chorus bottom bracket is the same quality as the Record bottom bracket. Maximum quality, lightness and exceptional smoothness are the hallmark of this system. The bottom bracket is a truncated taper...

For Campagnolo cranks utilizing the Over-Torque, 30mm aluminum bottom bracket spindle system