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#21
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program to compute gears, with table
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#22
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program to compute gears, with table
On 9/8/2017 11:46 PM, Emanuel Berg wrote:
John B. wrote: "well, we do still have a few 9 speed chains left". Anyone feel free to elaborate on this. How and why should the chain be different with different cassette/chainring configurations? And is there a "notation" do describe this? Usually makes it easier to understand... Overall width. 4/5 speed systems used very wide chain as you may recall. To get 8, 9, 10, 11 sprockets inside the 130mm road format (originally seven speeds) the sprockets are closer and so the chain is smaller. http://www.yellowjersey.org/photosfr...t/MANYCHAN.JPG -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#23
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program to compute gears, with table
On 9/9/2017 5:37 AM, Emanuel Berg wrote:
John B. wrote: The rear sprocket spacing is closer as the number of cassette cogs goes up, so narrower chains. The over all length of the cassette is limited by the distance between the rear drop outs as the wider the cassette the more the hub flange on that side must be offset and thus the angle of the spokes decreases. Okay? Is that the reason you simply cannot make the back fork wider? At some point the spoke angle will make for a wheel that isn't strong enough? People have been predicting doom in that regard for a very long while. In theory maybe but in practice not yet. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#24
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program to compute gears, with table
AMuzi wrote:
Overall width. 4/5 speed systems used very wide chain as you may recall. To get 8, 9, 10, 11 sprockets inside the 130mm road format (originally seven speeds) the sprockets are closer and so the chain is smaller. So could one have like a 3 sprocket casette with old chainring quality and then use a fat chain to not have to replace anything save for perhaps the chain, but even that much less often? Or does moving the chain wear down even wide sprockets? -- underground experts united http://user.it.uu.se/~embe8573 |
#25
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program to compute gears, with table
AMuzi wrote:
Okay? Is that the reason you simply cannot make the back fork wider? At some point the spoke angle will make for a wheel that isn't strong enough? People have been predicting doom in that regard for a very long while. In theory maybe but in practice not yet. I see, yet another "DANGER!" so the manufacturer can produce even more incompatible equipment. Show must go on! -- underground experts united http://user.it.uu.se/~embe8573 |
#26
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program to compute gears, with table
AMuzi wrote:
Overall width. 4/5 speed systems used very wide chain as you may recall. To get 8, 9, 10, 11 sprockets inside the 130mm road format (originally seven speeds) the sprockets are closer and so the chain is smaller. Is it enough to count the sprockets, e.g. does an 8 sprocket casette always have the same width? Or does that vary between manufacturers? And surely there aren't different chains for 8, 9, 10, and 11 casettes, i.e. four different chain sizes? -- underground experts united http://user.it.uu.se/~embe8573 |
#27
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program to compute gears, with table
On Saturday, September 9, 2017 at 12:40:29 PM UTC-4, Emanuel Berg wrote:
AMuzi wrote: Overall width. 4/5 speed systems used very wide chain as you may recall. To get 8, 9, 10, 11 sprockets inside the 130mm road format (originally seven speeds) the sprockets are closer and so the chain is smaller. Is it enough to count the sprockets, e.g. does an 8 sprocket casette always have the same width? Or does that vary between manufacturers? And surely there aren't different chains for 8, 9, 10, and 11 casettes, i.e. four different chain sizes? -- underground experts united http://user.it.uu.se/~embe8573 All you have to do is search the web under bicycle chain widths and you'll seethat 5 speed, 7 speed, 9 speed, 10 speed and 11 speed chains are ALL different widths to cope with the narrower spacings between cogs and also the thinner cogs. Cheers |
#28
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program to compute gears, with table
Sir Ridesalot wrote:
All you have to do is search the web Anything else you can do for me? -- underground experts united http://user.it.uu.se/~embe8573 |
#29
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program to compute gears, with table
On Saturday, September 9, 2017 at 1:29:12 PM UTC-4, Emanuel Berg wrote:
Sir Ridesalot wrote: All you have to do is search the web Anything else you can do for me? -- underground experts united http://user.it.uu.se/~embe8573 I did! I DID! After "web" I had also answered your qquestion with "...under bicycle chain widths and you'll seethat 5 speed, 7 speed, 9 speed, 10 speed and 11 speed chains are ALL different widths to cope with the narrower spacings between cogs and also the thinner cogs." Cheers |
#30
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program to compute gears, with table
On 9/9/2017 11:40 AM, Emanuel Berg wrote:
AMuzi wrote: Overall width. 4/5 speed systems used very wide chain as you may recall. To get 8, 9, 10, 11 sprockets inside the 130mm road format (originally seven speeds) the sprockets are closer and so the chain is smaller. Is it enough to count the sprockets, e.g. does an 8 sprocket casette always have the same width? Or does that vary between manufacturers? And surely there aren't different chains for 8, 9, 10, and 11 casettes, i.e. four different chain sizes? Surely you jest! There are variants within each format. Plus 12 speed now. Four chain models is not a shop inventory - it's nothing. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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