Category: Headsets

Headset Bearings
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Headset Bearings

It’s that time of year that we get asked about headset bearings… All Bird bikes use ZS44 / ZS56 headsets. What does this mean?  Well, the diameter of the inside of our headtubes is 44mm at the top, and 56mm at the bottom.  The ZS part stands for “Zero Stack”.  So that’s the headset size […]

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