Description of CeramicSpeed PF4630 Coated Ceramic Bottom Bracket PF46-68/79/86-30 Step up to a new and transformed riding experience. Stiffness, low friction and unmatched lifetime are encompassed within the excellent reliability delivered by CeramicSpeed Bottom Brackets. All CeramicSpeed Bearings are paired with high quality CeramicSpeed Balls and are pressed into lightweight aluminum cups. This ensures you the fastest riding and most saved energy.
PF4630 bottom bracket with anodized cups and ceramic bearings for 68-86mm wide bottom bracket shells with a diameter of 46mm and cranks with an axle diameter of 30mm.
Coated bearings come with an extremely thin (2-3 microns) protective layer, which is 75% harder than hardened steel. This is applied to the entire raceway, and makes the bearing even more resistant to contamination, as well as further reducing friction.