MR18307 VV Zero Ceramic Enduro Bottom Bracket Bearing 18mm x 30mm x 7mm Closed Cup width C: 17

Cup width C: 17

Pitch diameter B: 400mm

d - Bore: 35 mm

07 mm Shoulder diameter of inner ring (large side face)

MR18307 VV Zero Ceramic Enduro Bottom Bracket Bearing 18mm x 30mm x 7mm Closed Cup width C: 17Like Ceramic Hybrid, Zero Ceramic use a combination of ceramic (Silicon Nitride Si3n4) balls and steel races, except they are of higher Grade 3 quality. The races are also black oxide treated and ground toa mirror finish which prevents corrosion and provides near perfect efficiency and tolerances. Bearing Code: MR 17287 Dimensions: 18 x 30 x 7mm ABEC: 5 Grade: 3 Grease: Kyodo Yushi PS 2 Application: Hubs, Bottom Brackets Weight: 13. 00g