Cat's Cradle--Or Chainring

I promised myself not to make every other post about chainrings with elegant or unusual designs.  And I'm keeping my promise:  I've written three other posts since the one about the Liberia chainring.

So I don't feel guilty about writing another post about a sprocket, especially this one:

 

Its maker, Bespoke Chainrings of Australia, is producing this ring based on the design of one made by French manufacturer Solida around 1910.  

If you bought an entry- (or even mid-) level Peugeot, Motobecane, Gitane or other French cycle during the '70's Bike Boom, there's a good chance it had a Solida cottered crankset.  Some later bikes came with low-priced Solida melt-forged cotterless cranksets; apparently, Solida never made a high-quality forged cotterless crankset. However, at the time the original "cat" chainring was produced, Solida had a reputation that reflected its name: They were solid and sturdy, if not as light or refined as their counterparts from makers like Stronglight, Specialites TA or even Zeus or Nervar.  

That chainring certainly is charming and a temptation.  For now, Bespoke is making it only to fit cranksets with the 50.4mm bolt circle diameter.  Those cranks include the Specialites TA Pro-5-Vis (a.k.a. Cyclo Touriste) and Stronglight 49D, as well as other vintage models from Sugino and Nervar--and, of course, modern near-replicas from Velo Orange.

However, I'm not about to spring for another crankset.  Bespoke plans to make chainrings for cranks with other bolt patterns, including 110 and 130 mm.  If they can  replicate the cat pattern in 110, I'd go for it!

They also make "drillium" chainrings that mimic the ones of the '70's and early '80's and replacement dust caps for vintage Stronglight cranksets.  The rings are made to be used with multiple as well as single gears.

Eccentric Rings

Tonight, on my way home, I stopped in Flushing for a bite to eat.  Now, I've never been to Hong Kong, but Flushing is what I imagine Hong Kong would be like if it were transported to Queens.  Or, perhaps, with its ubiquitous neon, it could be seen as an Asian version of Times Square.

I wonder whether the makers of this Rudge-Whitworth ever imagined it in magenta neon light.  In some odd way, bike and light are not incongruous, at least to me.  


One particularly interesting feature of this bike is its chainring cutout pattern:

Is the hand halting or waving? Whatever it's doing, it looks good doing it on this bike.  


I'm guessing that the bike is from the 1940's or 1950's.  At that time there were dozens, if not hundreds, of bicycle manufacturers who made what we now think of as classic English 3-speeds.  (Many of those companies, including Rudge, were bought by Raleigh during the 1950's.) While, at first glance, they seemed almost the same, each model had its own particular set of details that set it apart. An example is in the chainwheel you saw in the above photo. Many other British makers used chainwheels with interesting and sometimes whimsical patterns cut into them.  The Raliegh three-speed I rode last year had a heron--Raleigh, which of course was Raleigh's corporate symbol. 


I've seen other chainrings cut out in interesting patterns. Here's one of my favorites:

It's on an AJ Warrant bike from Austria.  Although there's no earthly reason to use a cottered crankset today, I wouldn't mind having the one in the photo.