About the word "race" when talking about bike headset [closed]

I can't find any definition of "race" in its use for example on this page: https://en.wikipedia.org/wiki/Headset_(bicycle_part)

on Cambridge or Oxford dictionaries...

Someone can tell me where this word comes from ?


Solution 1:

It's the third sense listed on Merriam Webster:

3 : a track or channel in which something rolls or slides

specifically : a groove for the balls in a ball bearing or rollers in a roller bearing

The analogy with a mill race seems plausible, but I haven't made any effort to check it (and it's an independent meaning now, anyway).