Box Box Extremum External Bb 24Mm Black Bx-Bb13Exrac-Bk


The Extremum RacePrep™ is first external BB designed for BMX racing and features non-contact, titanium-coated SUS bearings, modified low-friction seals and lighter weight lube. The titanium coating results in a low friction coefficient, increased corrosion resistance and smoother rolling bearings. The result is a BB with less drag and a level of bearing protection more in line with the needs of BMX racers.

Promax EX-1 BB

EX-1 External bottom brackets feature cold-forged and CNC-machined alloy cups, dual-labyrinth bearing covers and precision sealed bearings. They are the perfect match to Promax CF-2 and HF-2 cranks and ultimate upgrade to the budget BBs sold with most crank sets.

Price: 80.99