In article <[email hidden]>,
Earl Bollinger said:"Qui si parla Campagnolo" <[email hidden]> wrote in message
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Quoted message said:
Earl Bollinger said:"RP10128" <[email hidden]> wrote in message
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> One of the teeth on the cog that I use the most has worn down
> after only 2000 miles, causing chain skip. And that cogset replaced
> one that lasted only five months, and an even shorter distance.
>
> Doesn't that sound like abnormally fast wear? I do use the cog
> in question to climb virtually every time I work out, putting heavy
> load on that cog for about a third of the 2,000 miles. But even so,
> the wear sounds abnormally fast to me. What am I doing wrong? I
> don't lubricate my chain, and I wonder if that is contributing to the
> rapid wear.
Yes I would consider that to be very true.
An unlubricated chain will wear abnormally fast, which leads to a
abnormally
Quoted message said:Quoted message said:fast cogset wear too.
Much of the wear on a cogset is due to chain stretch, which forces the
chain
Quoted message said:Quoted message said:to wear the teeth down faster on the cogset.
A cheap chain wears faster than a higher quality chain, and a cheap
cogset
Quoted message said:Quoted message said:wears faster than a high quality cogset too.
Small point. A 'cheap' chain is the same as an 'expensive' chain w/o
the plating. The rollers, pins, etc are the same so wear, longevity and
performance is the same. When talking about things like a 105 9s chain
and a DA 9s chain. A Sram PC-950 and a PC-991, with holow pins or
something. 'cheap' chains don't really wear faster than 'expensive'
chains.
I find it hard to beleive that a $9.95 no name chain would be as good as one
of the brand name chains from Wipperman, Sram, Shimano, etc. Or that it
would wear and last as well as a brand name chain.
The same for the rear cassette, the no name $19.95 cassette as compared to a
Shimano, or SRAM type of cassette.
The manufacturing of the wear surfaces is pretty close to a constant,
unless you're really wedded to now-unavailable 5-piece chain.
What changes with more expensive chains is they get nicer finishes,
subtle detail changes to make them lighter (holes drilled mid-plate,
hollow pins, etc.)
You can believe what you want, but I think the race bike I ride on has a
PC-48 or something on it, worth C$20, I think. That's the most expensive
chain I've ever bought.
The tolerances demanded by the stuff a chain has to interact with are so
tight that there's really not much room for trickery of any sort. The
manufacture is so thoroughly automated that there's not much room for
hand-crafting or detailing.
About the only really crazy chain I know of is the boutique Ti chains
available for well over 3 figures. Very light. Very crazy.
--
Ryan Cousineau [email hidden] http://www.wiredcola.com/
"I don't want kids who are thinking about going into mathematics
to think that they have to take drugs to succeed." -Paul Erdos