-
Thanks for all the input so far
Would things improve if I added the orange lines and possibly take the purple line away?
BB is now higher :)
1 Attachment
-
user67706akajimmythegrin
-
you need some triangulation or gusseting.
-
I'm no structural engineer, but the front end is lacking a massive amount of torsional rigidity which means the lone purple tube in your picture will twist under load/change of direction/cornering. Adding a deck will add some structural integrity, but I suspect the orange lines you show if placed at a different plane/height (from viewing the bike side-on) will add torsionally rigidity, whilst creating improved top-load (in the same way the deep rectangular box section on Bullitt bikes do.
Looks like a great project, jealous of what you're up to, but I have a house to renovate so any bike related projects are on hold...
drøn
thebrenthamtaffy
@user67706akajimmythegrin great project, but my comments would be the same as @AngusMacGyver. Even with the revised frame (unless it's still work in progress...) the front end needs more support under vertical load otherwise it will flex loads and eventually fail. Look how deep the sections are on Bullitt bikes for example and like AngusMacGyver's repurposed Muddy Fox above. Pedal clearance would be a concern if it's still the same as your photo above...
Keep it coming though... :)