Swing Bike

Colins Swing Bike

Concept

Swing bikes have been around for a long time, but recently my friend Colin created his own version, integrating the rear steerer into the seat tube. I sought to iterate on this design, but with a smaller 20in wheel in back.

My swing bike design, featuring a smaller rear wheel and shorter chainstay length

Front parallelogram in a 3D printed jig

Fully Welded front with a jig piece stuck inside... oops

CNC machined head tube badge, brazed on to the front head tube

3D printed jig for mitering the seat stays

Primo seat stay fitup

Rear Triangle in the Anvil Jig

If I had a nickel for every time I welded a steerer tube extension...

I did the powder coating for this frame myself. The results were pretty lackluster. Doing it myself made me appreciate the work that professional powder coaters do. The sand blasting, cleaning, outgassing, masking, and powder application is a pretty challenging processing for something like a bike.

Assembly in progress

IMG_5355.MOV

The shortened chainstays make this thing super nimble and responsive, perhaps too much so. It definently is less stable than other swing bike iterations of this design, but is much more sensitive and capable in low speed swinging

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