Shimano BB-UN300 Square Taper Bottom Bracket - 68x122mm BF Apparel Available in 11-30T and 11-34T

Available in 11-30T and 11-34T gear ranges

and tyre inflator

6066 Alloy Construction

If you are considering our Ultegra 8000 chainring to replace your original chainring for other 110 BCD (4-bolt) asymmetric crankset design (Ultegra 6800 or similar)

Silicon coated strap: length: 270mm / width: 38mm

Shimano BB-UN300 Square Taper Bottom Bracket - 68x122mm BF Apparel Available in 11-30T and 11-34TThe 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