Shimano BB UN100 Square Taper Bottom Bracket

Shimano BB-UN100 (Tourney TX800 Series) Cartridge Bottom Bracket for JIS square taper cranks, offers superior quality and reliability with great value. Cartridge sealed bearings allow for quick and precise assembly. Suitable for traditional square mount chainsets, featuring a 68mm shell with BSA (English) 1.370" x 24tpi thread. Crank bolts are not included. Size: 68 x 122.5mm Thread: BSA (English)