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BB-UN300 Bottom Bracket 68x122.5mm

BB-UN300 Bottom Bracket 68x122.5mm

Regular price $30.00 NZD
Regular price Sale price $30.00 NZD
Sale Sold out
Tax included.

The BB-UN300 square taper bottom bracket was launched by Shimano as successor of the models BB-UN26 and BB-UN55.

It covers a wide range of applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN300 is available with BSA thread and in different axle lengths. 


  • Bearings: steel
  • Axle Material: steel
  • Bottom Bracket Cup Material: aluminium (left), aluminium / steel (right)
  • For all cranks with JIS square mount
  • Crank bolts not included
  • Narrow body allows clearance for cable routing under the bottom bracket


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