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Old July 11th 17, 06:35 AM posted to rec.bicycles.misc
John B.[_3_]
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Posts: 5,697
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On Mon, 10 Jul 2017 22:52:09 -0300, Joy Beeson
wrote:

On Mon, 10 Jul 2017 13:36:10 +0100, "Peter Duncanson [BrE]"
wrote:

"chainwheel" is used by the British company Brompton Bicycle Ltd.

It is used to refer to the whole "wheel" to which the pedals are
attached. The "chainring" is the replaceable outer part of the assembly.


That explains why I say "big ring" and "small ring", but my internal
editor balks at "chainring".

Just checked: the larger chainwheel on my Fuji is all one piece, and
the small ring is bolted to it.

Really small; the mechanic told me that it was supposed to be the
inmost ring of a triple crankset. It makes shifting touchy for the
first few weeks after I've been shut in for a while, but it made it
possible to ride in Albany County, New York, and is even more
important now that I don't run up and down stairs several times for
every meal, and have to spend the winter inside. (Ob AUE: is the
comma after "meal" necessary?)

It seems to me that "ring" for "wheel" is standard metonymy, like
"wheels" for "car", "blade" for "knife", and "spare tire" for "spare
wheel". In each case you refer to the whole by the name of the
important part.

I think "crankset" a superior term to "chainset"; a person
encountering "crankset" for the first time would need very little
context to deduce that it's a pair of cranks with some necessary parts
attached, particularly if he's familiar with "frameset". "Chainset"
could easily mean the entire drivetrain.


I suggest that it is a matter of terminology and common usage.

If, for instance you went into a motorcycle shop and asked for a
"front chain wheel" for a Harley 74 you'd probably get some strange
looks and if you went to some commercial companies and asked for a
"chain wheel you would get something that looked like
http://www.trumbull-mfg.com/products...le-chainwheels
And of course if you visit your LBS and ask for a front sprocket you
may get corrected.

But by the same token a "yard of cloth" is not necessarily the same
width as a different yard of cloth :-) and if a traditional cook a
small woman's "pinch of salt" is not always the same as a big woman's
pinch :-) and even worse, some measure their cooking ingredients by
"about that much" or "just the right amount" :-)
--
Cheers,

John B.

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