This is probably enough for an entirely different thread! But I would love to collect some real-world data on the relationship between the tube spec (diameter and thickness) and frame stiffness for different geometries.
A while back I did a hacky FEA parameter sweep across tube sizes and frame sizes, looking at front triangle torsional stiffness:
We use this as a baseline for making decisions for tube specs and different riders. However, it would be great to back it up with some lab data.
Other things to test:
- rear triangle stiffness
- to SS brace or not SS brace
- fatigue life
- life cycle testing of different joining methods
- Validity of ISO standards