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CAD system checkout of ergonomics, heel to Wheel clearance etc. That much overlap is ok to me.

The Donor boom tube was mitered using a Drill with a hole saw bit sized to fit head tube.

The Boom is strapped on and tack welded then alignment checked.

After completed weld

Frame Materials:   16 " steel kid bike and a donor bike's BB and downtube, the seat is to be fitted with strong concentric seat posts.

Weight as pictured: 25 lbs without the seat. 50 lbs with seat.

What was I thinking?:

How to make a regular bike into a recumbent with office chair for "Bike To Work Day" theme.  

How Does it ride?:

It is stable and well behaved from 2-25 mph.   It has the factory geometry but with redistributed weight.   Its awkward to start and stop since it's hard to reach feet to the ground.   The bike has a very solid feel.

What changed after the pictures on this bike?:

I rebuilt the seat position a little lower and a lot more forward. I added an old keyboard to the handle bars so I could simulate working like I do at my desk job. :-)

What would I do differently on another attempt?:

I would lower the BB a little and tilt the seat pan forward a little to allow feet to touch ground easier.

What lessons were learned?:

Bike design and execution are actually very forgiving if your expectations are low and your humor is good.     You can make a truly silly comfort seat bike.

What are the keeper developments?: The underlying conversion of small kid bike to recumbent.

 

tomkabat@aol.com

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