Shimano
BB-UN300 Bottom Bracket 68x122.5mm
BB-UN300 Bottom Bracket 68x122.5mm
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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.
Features
- 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
Materials
Materials
Shipping & Returns
Shipping & Returns
Dimensions
Dimensions
Care Instructions
Care Instructions

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