What length square taper axle do I need?

How to figure out the optimal axle lenght for square taper bottom brackets.

CONTENTS:
00:00 Introduction
00:56 Trial and error
01:55 ISO vs JIS taper
02:51 Chain-line
05:13 The limits
05:56 Usual lengths
07:50 Test mount - placement
11:06 Rough axle length guide

Useful LINKS:

If you have any questions, please use the BikeGremlin forum (I try to respond to every comment, but YouTube sucks at notifications, especially when it comes to any follow-up questions):
https://www.bikegremlin.net/

Chainline explained (what is chainline and how to measure it):
https://bike.bikegremlin.com/1755/bicycle-chainline/

Threaded bottom bracket standards:
https://bike.bikegremlin.com/1634/bicycle-bottom-bracket-standards-explained/

A list of BikeGremlin websites and channels:
https://www.bikegremlin.com/

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

id: 1136