Shimano BB-UN300 Square Type BSA Bottom Bracket Length:118mm Precise Boot Flex

Precise Boot Flex

This pole has a 5083 aluminum shaft

a race-ready binding that strikes the right balance between weight and power

Composition Co-polyester Monofilament

Shimano BB-UN300 Square Type BSA Bottom Bracket Length:118mm Precise Boot FlexSHIMANO Square Type Bottom Bracket MTB Standard Structure FEATURES SHIMANO quality performance cartridge bearing square bottom bracket Better chainline stability with chain line stabilizer 3 structures available Standard, E type, chain case options Adapter material: Aluminum MODEL NO BB UN300 SERIES TOURNEY A070 Series Remarks * w Crank arm fixing screws spec. only ** w Crank arm fixing screws spec. is available Structure Standard Spindle Square type