Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm D4 250mm in Length – Accommodates

250mm in Length – Accommodates bars up to 50cm

Efficient and ergonomic overlapping design optimized for high pressure applications

Butyrospermum Parkii (Shea) Butter

long-lasting application of power to the drivetrain

Optimized 7000-series forged aluminum arms support the X-SYNC 2 chainring for complete chain control

Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm D4 250mm in Length – AccommodatesThe 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