On Apr 13, 1:00 pm, wrote:
A current thread leads to some marvelous pictures of old bikes:

http://www.tuttocampybici.com/index.php

For the old bikes, choose gallery and click on prewar.

You end up he

http://www.tuttocampybici.com/browse...php?tag=prewar

To save time, I link directly to large images, but you really should
start at the home page and browse wildly.

Here's some long-pitch block chain:

http://www.flickr.com/photo_zoom.gne...2139683&size=o

On the bottom run of chain, you can see the short, solid block that
connects the long-plate links. (A variant called double-roller chain
replaced the solid block with a pair of short links, but you can see
that the blocks here are solid.)

Note the tiny in-tension chain "stays" and in-tension down "tube"
common in antique frame designs.

Here's some ordinary long-pitch roller chain on what looks like a 18
front-tooth x 9 rear-tooth setup:

http://www.flickr.com/photo_zoom.gne...4095548&size=o

It's just modern chain with links twice as long.

Note the complicated levers along the down-tube that operate the rear
spoon brake, and the absence of a seat-post.

Pictures of 3 different shaft drive bikes:

First bike, front enclosed, rear rack and pinion exposed (maybe a rear
case removed?):

http://www.flickr.com/photo_zoom.gne...2140051&size=o

Same bike, exposed rear teeth appear to be in good shape:

http://www.flickr.com/photo_zoom.gne...2125206&size=o

Second shaft-drive bike, front and rear exposed, rear engages forward
of axle:

http://www.flickr.com/photo_zoom.gne...2139973&size=o

Third shaft-drive bike, heavy frame bracing at rear gear, spider-web
shock-mount for rear fender, wooden rim:

http://www.flickr.com/photo_zoom.gne...2125314&size=o

Speaking of wood . . .

http://www.flickr.com/photo_zoom.gne...2140385&size=o

Timber!

http://www.flickr.com/photo_zoom.gne...2124606&size=o

The weirdest chain ever seen:

http://www.flickr.com/photo_zoom.gne...4095459&size=o

How do you measure chain wear on that thing? Note the Schrader or
Woods valve and the spider-web shock-mount for the fender.

Hope everyone else has as much fun browsing as I did--it's a wonderful
site to find on a snowy spring day:

http://www.tuttocampybici.com/index.php

Cheers,

Carl Fogel

Note the tiny in-tension chain "stays" and in-tension down "tube"
common in antique frame designs.


No, no, Carl! They are, not in tension! They stand in compression!
Now repeat after me, three times...