Shimano UN55 English SQUARE-JIS 73x110mm Bottom Bracket giant Maximum capacity of 16 teeth

Maximum capacity of 16 teeth

It delivers precise and consistent shifting performance across a wide range of MTB conditions

9mm max dimension is controlled by the Shimano spec

When you want to make the transition from backpack to panniers

Tubular AL-6061-T6 construction

Shimano UN55 English SQUARE-JIS 73x110mm Bottom Bracket giant Maximum capacity of 16 teethShimano's BB UN55 Square Spindle Bottom Brackets are the unofficial standard for English threaded cartridge bottom brackets. Quality, value, and durability come together to keep you cranking for many, many miles. Fits JIS Square Taper Cranksets Hollow spindle Crankarm fixing bolts not included