Design: Sealed cartridge bearings, fits 68 mm bottom bracket shell. Square taper bottom bracket. Matte black finish.
Feature: It is a integrated sleeve and inside bearing to make sure the bearing rotate stably. Waterproof, dust bearing and bearing shield design, which can help to prevent the erosion of sediment water.
Size: 68 x 124.5mm (2.7" x 4.9").
Cups thread diameter: 34.5mm /1.36".
Integrated structure: No abnormal noise, with no gaps to prevent the assembly stuck,safe for use.