Shimano'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 sp
Shimano’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
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