Uploaded November 2025 | Updated September 2026, 2 weeks ago

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This video outlines the importance of the IS52 headset standard across Road, Gravel and MTB. It is a size that easily allows internal cable routing, but even within the IS52 name there are variations to be aware of and solutions to be found. This video centers on the main brands in this space.
DEDA DCR System,
FSA ACR system
Acros,
and Token.
We also take a deep dive into Shimano PRO and their use of the Token system.
Towards the end of the video we look at corrosion resistant options from Token, Enduro and Ceramic Speed.
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Chapters:
00:00 What is IS52 headset bearing
01:20 52mm, 51.9mm, or 51.8mm
02:12 Deda ACR system
04:00 FSA ACR system
06:50 The Token 4 in 1 headset
08:32 TIME Scylon Promo
09:43 Can you fit a smaller bearing?
11:50 Shimano PRO Vibe Aero deep dive into compatibility
18:50 Some anti corrosion upgrades