Re: What's old is new again...Pinion's great grandpa

On 2025-04-18, AMuzi <am@yellowjersey.org> wrote:

On 4/17/2025 10:28 PM, pH wrote:

I happened to stumble upon this "restoring a bike" video.
 
Not much talking in it, but it seems to be a *two speed bottom bracket*
bike. I had never heard of such a thing...on this group or anywhere.
 
https://www.youtube.com/watch?v=SUi0PMG503g
 
The gearbox does not really make an appearaance until the "assembly" phase
of the video.
 
My mind immediately jumps to: How about pairing it with a two-speed rear hub
for a total of four speeds or a three speed and on and on.
 
I am very curious if anyone is familiar with this beast asto what the
ratios would be...direct drive, no doubt, and....?
 
pH in Aptos
 
 

>
It can be done, and has, but Archibald Sharp spent some
several paragraphs on why gearing is better applied at the
driven end than the drive. In 1899.
>

Ah. Okay...thank-you for that information.  I assume this goes for the
Pinion, then, too, eh?

ph