which chainless bicycles to fund?

[preslove]

If I wanted a chainless bike, I'd buy this: http://www.dynamicbicycles.com/chainless/

The designs in the op look dumb.

 

[alzan]

Those look incredibly painful for anyone with a penis.

This...

::tries to imagine leaning forward that much::

...

::clutches balls reflexively::

...and this = /thread

 

[phucheneh]

I always thought gears were the work of the devil. This is right up my alley. Now if only we could figure out a way to get rid of other simple machines. Like the wheel. I'd like this bicycle a lot better if the wheel were replaced with a small irregular shaped piece of granite. And the pedals... well, that's just a lever isn't it? High tech sorcery! We'll get rid of that entirely. I'll grab my bicycle, put it between my legs, lift it so that it gently caresses my man-parts and run down the street the way God intended.

Gears != cogs.

Not to be a douche about it; I think I called them gears, too. But cogs are driven by a belt or chain; gears are driven by...other gears.

I only mention it because if the guy wants a durable setup that is relatively cheap to make, gears actually seem like they would work pretty well. Simply have a little network of gears between the pedals and the rear wheel, held in a sealed case.

To whoever mentioned planetaries- planetary gears alone wouldn't really solve anything. You don't need their best features (compactness and strength) in a bicycle application.

 

[mmntech]

Both those look stupid. There's a reason why bikes are geared. It's just too hard to peddle those huge wheels, especially on any hill. Practical chainless bikes have been around for ages. They're belt or shaft driven.