Left and right cups separated, joining the cups with a plastic sleeve, optimized design for light weighting.
"Dark grey" version features SUPER CERAMIC bearings.
"SUPER CERAMIC"
Made-in-Japan, highest grade, high precision ceramic bearings are used to ensure super smooth and long-lasting rotation. Cyclists need to adjust power and cadence depending on terrains, so the ceramic bearing is most effective as less energy is required to turn the crank. It offers remarkable performance gain under high load conditions such as competitions.

Upgraded to Version2
The gasket rings provide secure fitting and keep water out of the frame. No thread locking agents (such as Lock Tight) are required. BB can easily be installed, removed and reused without fitting degradation, making the BB shell ideal maintenance hatch for internal cables.
Frame standard : BSA
Axle : IDS24
Cup thread : BC1.37x24T
BB shell width : 68mm
Bearing : Ceramic (Dark grey) / Steel (Silver)
The BB series features sophisticated super-low friction seal to protect bearing against water and dust and offers excellent rotation performance for smoother pedal strokes. Internal maintenance of the bearing is not required.
Left and right cups separated, joining the cups with a plastic sleeve, optimized design for light weighting.
A slim sleeve allows Di2 wire to go around it.
What type of bottom bracket do I need for my bike? Please check ;
MB608 Ver. 2 SUPER CERAMIC
"SUPER CERAMIC"
Made-in-Japan, highest grade, high precision ceramic bearings are used to ensure super smooth and long-lasting rotation. Cyclists need to adjust power and cadence depending on terrains, so the ceramic bearing is most effective as less energy is required to turn the crank. It offers remarkable performance gain under high load conditions such as competitions.