Shimano UN55 English SQUARE-JIS 73x110mm Bottom Bracket giant It delivers precise and consistent

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

When all you need is a shield to block wind

Presta valve compatible

Heat Sink: No

The model is available for gents and ladies: the B17 (gents) and B17 S (ladies)

Shimano UN55 English SQUARE-JIS 73x110mm Bottom Bracket giant It delivers precise and consistentShimano'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