Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm Link Sports While brake and wheel technology

While brake and wheel technology has driven frame and tire manufacturers to rethink road frame design

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Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm Link Sports While brake and wheel technologyThe quality and performance oriented Shimano BB UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line. Specifications Adapter: aluminum (left), aluminum steel (right) Axle: steel Mfr Claimed Weight TBC