Which headset cups dimension to buy?

How to figure out which headset bearing/cups you need for your bike?

CONTENTS:
00:00 Introduction
02:12 The basics
03:40 The frame (head-tube) - press-fit vs slip fit
05:56 External (EC) VS Internal (ZS)
07:25 Forks (threaded, threadless, tapered)
09:11 Head-tube (cup) diameter
12:34 Fork thread pitch
13:27 Measuring fork diameter
16:26 Summing it up
18:44 Integrated headset bearing angle
23:00 Conclusion

Useful LINKS:

Headsets [01] Names of fork and headset parts:
https://bike.bikegremlin.com/3246/names-bicycle-head-tube-fork-headset-parts/

Headsets [02] Important fork, head tube and headset dimensions:
https://bike.bikegremlin.com/3243/important-fork-headset-bearing-dimension/

Headsets [03] Headset bearings standards – SHIS:
https://bike.bikegremlin.com/3476/bicycle-headset-bearings-standards/

Fork crown race removal with improvised tools:
https://bike.bikegremlin.com/2385/fork-crown-race-removal/

Installing bicycle headset bearings with improvised tools:
https://www.youtube.com/watch?v=qzqONtsEqXY

Bicycle assembly 02 - installing stem, setting preload:
https://www.youtube.com/watch?v=EB8bp4Ojr8Y

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https://www.bikegremlin.com/

List of all the BikeGremlin videos, sorted by categories:
https://www.bikegremlin.com/youtube/

Camera: Gox

id: 1229

List of all my videos, sorted by categories (so you can easily find the answers, tips, and tutorials you need):
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