The BB-4000 spins on oversize cartridge bearings with a die-casted alloy and CNC machined external cups.
DESCRIPTION & MATERIALS • Oversize Cartridge Bearings • Die cast alloy and CNC machined external cups • Reinforced Polymer center sleeve w/ double o-ring seals SIZES • Available in 68mm (BSA) and 70mm (ITA) size FINISH • BED cups WEIGHT • 97 g
- MegaExo Bearing Bottom Bracket Installation Instructions (Oct 2010) >> - BB-6000 / BB-4000 MegaExo Crankset Installation Instructions (Jul 2010) >>