Shimano BB-UN300 Square Taper JIS 68x117.5 Spindle BSA (English) Bottom Bracket

Available from Good Weather Bicycle when we last checked. Sold from the shop’s own store; the price there is the one that counts.

The workhorse square taper bottom bracket. If your crank is older than your phone, this is very likely the part that gets it spinning quietly again. Sealed cartridge, no adjustment, no fuss. Threads into a standard 68mm English shell and runs a 117.5mm hollow spindle for JIS square taper cranks. Shell: 68mm, English / BSA threaded Spindle: 117.5mm, square taper JIS, hollow Sealed cartridge bearings, non-serviceable Finish: silver MPN: EBBUN300B17X Crank fixing bolts sold separately Not sure whic