Headtube to Headtube: Aceoffix C5 vs Brompton G line

*Edit. Upon further research, i found out that the G line headtube internal diameter is actually 48mm and with a 51mm external diameter, it means the tube wall thickness is actually 1.5mm so I was generous with the 2mm assumption! After the video on some recent G line frame failures (   • Major Brompton G Line Design Flaw?  ), I decided to take apart the front end of my Aceoffix C5/T1 to see what kind of engineering changes, if any, Aceoffix did to adopt the Brompton-esque headtube design for the aluminium alloy frame material. 6069 research paper: https://www.researchgate.net/figure/E... 6069 T6 Aluminium Alloy Specifications: https://www.matweb.com/search/DataShe... 4130 Chromoly Steel Specifications: https://www.matweb.com/search/DataShe... Timestamps: 00:00 - Introduction 01:07 - Disassembly 04:23 - Front Carrier Block Nuts 06:13 - Headtube Thickness 07:09 - 6069 T9 Specifications 12:54 - 6069 Aluminium Alloy vs 4130 Chromoly 18:11 - Conclusion 21:16 - Bonus C5 Content Instagram: @velocityprintworks Email: [email protected] Webstore for things I make: www.Velocityprintworks.com