The Shimano BB-UN300 is a threaded square taper bicycle bottom bracket. With a shell width of 68 mm and an axle length of 127.5 mm, it is suitable for bicycles and cranksets with corresponding compatible dimensions.
The bottom bracket features a BSA shell diameter and/or BC1.37 thread and is screwed into the compatible bottom bracket shell. The square taper design allows for use with matching square taper cranks.
The BB-UN300 is designed as a non-series component and is suitable as a replacement bottom bracket for the repair and maintenance of compatible bicycle drivetrains.
Product features:
• Shimano bicycle bottom bracket
• Model BB-UN300
• Square taper design
• Shell width 68 mm
• Axle length 127.5 mm
• BSA (BC1.37)
• Threaded installation
• Non-series
• Color: Black
Technical data:
• Product type: Bicycle bottom bracket
• Brand: Shimano
• Model code: BB-UN300
• Group: Non-series
• Design: Square taper
• Shell width: 68 mm
• Axle length: 127.5 mm
• Installation: Threaded
• Shell diameter / thread: BSA (BC1.37)
• Color: Black
| General | |
| Brand | Shimano |
| Type | Bottom bracket |
What's in the box:
- check_circleProduct (pre-assembled)
- check_circleCharger
- check_circleUser manual
Shipping is carried out by a freight forwarding agency. We will contact you by phone prior to delivery.
Komm vorbei – wir beraten dich!
Not sure whether the part fits your model? No problem! Drop by our store in Vienna – our experts will check the fit, advise you and fit it for you on the spot if you like.
Vienna Store
Weyringergasse 37
1040 Vienna, Austria
Opening hours
Mon-Fri: 10:00 - 19:00
Sat: 10:00 - 14:00
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