#11
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re-using chains
news.virgin.net wrote:
That's how I figured it - since were on the subject though, I don't really understand the business of measuring the chain periodically to see if it needs replacing in order to avoid chainging the cassette. How many chains do you get to a cassette if you do this and is it economically sensible ? If you don't measure your chain, and replace it when needed, you will only get one chain per cassette (and chain rings etc). Also once the chain starts wearing it will be more likely to skip or break, and performance goes down. At a complete guess, if you only get three chains to a cassette, and each chain lasts 2/3 of the time than running a chain cassette combination into the ground would, then you would be paying for three chains and one cassette instead of two chains and two cassettes. This is economically viable, and ignores the cost of replacing the extra chain rings as well. Martin. |
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#12
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re-using chains
"Martin Dann" wrote in message
... news.virgin.net wrote: That's how I figured it - since were on the subject though, I don't really understand the business of measuring the chain periodically to see if it needs replacing in order to avoid chainging the cassette. How many chains do you get to a cassette if you do this and is it economically sensible ? If you don't measure your chain, and replace it when needed, you will only get one chain per cassette (and chain rings etc). Also once the chain starts wearing it will be more likely to skip or break, and performance goes down. At a complete guess, if you only get three chains to a cassette, and each chain lasts 2/3 of the time than running a chain cassette combination into the ground would, then you would be paying for three chains and one cassette instead of two chains and two cassettes. This is economically viable, and ignores the cost of replacing the extra chain rings as well. I reckon the numbers are slightly less favourable than that to the replacing chain scenario - they last for really quite a long time after they've worn to the point that a new chain won't fit the sprockets. cheers, clive |
#13
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re-using chains
On 26/01/2008 19:20, Martin Dann wrote:
At a complete guess, if you only get three chains to a cassette, and each chain lasts 2/3 of the time than running a chain cassette combination into the ground would, then you would be paying for three chains and one cassette instead of two chains and two cassettes. This is economically viable, and ignores the cost of replacing the extra chain rings as well. Doesn't sound viable to me. Of course, I have to buy 3 standard chains to make one complete chain, so it's a choice between paying for 9 chains and one cassette or 6 chains and 2 cassettes. -- Danny Colyer http://www.redpedals.co.uk Reply address is valid, but that on my website is checked more often "The plural of anecdote is not data" - Frank Kotsonis |
#14
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re-using chains
You can buy a chain in Tescos for £7!
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#15
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re-using chains
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#16
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re-using chains
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#17
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re-using chains
Rob Morley writtificated
The number of chains per cassette varies with riding conditions and maintenance practice as well as the quality of the components - wet weather will kill chains quicker, while dry dusty conditions are harder on sprockets. And lubing a dirty chain kills 'em quicker than anything :-/ |
#18
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re-using chains
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#19
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re-using chains
On 26/01/2008 19:20, Martin Dann wrote:
At a complete guess, if you only get three chains to a cassette, and each chain lasts 2/3 of the time than running a chain cassette combination into the ground would, *then you would be paying for three chains and one cassette instead of two chains and two cassettes. *This is economically viable, and ignores the cost of replacing the extra chain rings as well. Bear in mind that the rings and sprockets will wear at different rates- The combinations you use most often (and/or at highest load) will see more wear than the others. The first stage of failure is therefore a tendency to skip on those lightly used combos, where there is a mismatch between chain wear and cog wear. A new chain will be fine on the lightly used cogs, but will skip on the worn ones- if you can change out the worn parts (eg middle ring on a triple or a couple of the cogs on the cassette/freewheel) then you can probably get a lot more miles out of the remainder. I wore out the middle (36t) ring on my tourer well before anything else. Next time it went I changed the smallest ring, too, but the biggest (48t) was still OK. Whether Shimano makes this feasible is another question- I strongly suspect that they would discourage this sort of cavalier disregard of their marketing...! Better manufacturers will supply spares for their products long after the original purchase. I'm using Stronglight chainsets at the moment- I'd probably go for TA out of choice but they are expensive. On 26 Jan, 19:38, Danny Colyer wrote: Doesn't sound viable to me. *Of course, I have to buy 3 standard chains to make one complete chain, so it's a choice between paying for 9 chains and one cassette or 6 chains and 2 cassettes. The wear is spread over three times as many links, too, so presumably the chain lasts much longer, rendering the calculations even less favourable. Cheers, W. |
#20
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re-using chains
wrote in message
... Whether Shimano makes this feasible is another question- I strongly suspect that they would discourage this sort of cavalier disregard of their marketing...! Better manufacturers will supply spares for their products long after the original purchase. I'm using Stronglight chainsets at the moment- I'd probably go for TA out of choice but they are expensive. Chainring wear is entirely normal, and Shimano are in the business of producing high quality bike parts (as well as the stuff you see on BSOs), so yes, you can get replacement rings for shimano chainsets. And because so many are sold, there's also a very healthy number of other manufacturers offering shimano-compatible rings. Including Stronglight and TA... cheers, clive |
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