Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm D4 but short enough not to

but short enough not to experience twist or damage under moderate torque as experiences on longer tools

250mm in Length – Accommodates bars up to 50cm

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

race mount for the ultimate Tour de France level performance

making the sunglasses ideal for use in a wide variety of riding conditions

Shimano BB-UN300 Square Taper Bottom Bracket - 68x118mm D4 but short enough not toThe 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