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PostPosted: Sun Jul 15, 2018 2:10 pm 
GOLD | PoTM | Rider | rBOTM
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 Post subject: Re:
PostPosted: Sun Jul 15, 2018 2:49 pm 
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I just put another two links in the chain on my 12-speed. Now 108 (edit:110) links. Here's the resulting new tooth visitation schedule of the marked link:

42 Ring: 1,27,11,37,21,5,31,15,41,25,9,35,19,3,29,13,39,23,7,33,17.
52 Ring: 1,7,13,19,25,31,37,43,49,3,9,15,21,27,33,39,45,51,5,11,17,23,29,35,41,47.

Every odd-numbered link is visited in both rings. But A fixed/SS chain is I guess 8-16 links shorter than a derailleur chain, so the question is, how many links do you remove from the chain to maintain this?

..and that, kiddies, (that includes me) is probably why the old 'long' dropouts had an inch's worth of adjustment- so you could refine your fixed/SS chain length by two links, or even four links, to get all your teeth visited, and still get your chain tension right..


Last edited by torqueless on Sun Jul 15, 2018 7:43 pm, edited 1 time in total.

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 Post subject: Re: Re:
PostPosted: Sun Jul 15, 2018 4:41 pm 
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torqueless wrote:
I just put another two links in the chain on my 12-speed. Now 108 links. Here's the resulting new tooth visitation schedule of the marked link:

42 Ring: 1,27,11,37,21,5,31,15,41,25,9,35,19,3,29,13,39,23,7,33,17.
52 Ring: 1,7,13,19,25,31,37,43,49,3,9,15,21,27,33,39,45,51,5,11,17,23,29,35,41,47.

Every odd-numbered link is visited in both rings. But A fixed/SS chain is I guess 8-16 links shorter than a derailleur chain, so the question is, how many links do you remove from the chain to maintain this?

..and that, kiddies, (that includes me) is probably why the old 'long' dropouts had an inch's worth of adjustment- so you could refine your fixed/SS chain length by two links, or even four links, to get all your teeth visited, and still get your chain tension right..


I didn't think the length of chain had any bearing?


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 Post subject: Re: Re:
PostPosted: Sun Jul 15, 2018 6:54 pm 
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torqueless wrote:
42 Ring: 1,27,11,37,21,5,31,15,41,25,9,35,19,3,29,13,39,23,7,33,17.
52 Ring: 1,7,13,19,25,31,37,43,49,3,9,15,21,27,33,39,45,51,5,11,17,23,29,35,41,47.


That looks to me like 110 links.

Keith


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 Post subject: Re:
PostPosted: Sun Jul 15, 2018 7:37 pm 
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keithglos wrote:
torqueless wrote:
42 Ring: 1,27,11,37,21,5,31,15,41,25,9,35,19,3,29,13,39,23,7,33,17.
52 Ring: 1,7,13,19,25,31,37,43,49,3,9,15,21,27,33,39,45,51,5,11,17,23,29,35,41,47.


That looks to me like 110 links.

Keith


Just had a recount. You are right Keith. Which means it must have been 108 before. :oops: Having lost all counting credibility, I will go back and edit my posts..

@PeachyPM:

You should read LongboardSi's and mattr's posts on page 4


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 Post subject: Re: Re:
PostPosted: Sun Jul 15, 2018 8:36 pm 
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torqueless wrote:

@PeachyPM:

You should read LongboardSi's and mattr's posts on page 4



Did that first time around, just read them again, still confused :facepalm:


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PostPosted: Sun Jul 15, 2018 8:46 pm 
King of the Skip Monkeys
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PostPosted: Sun Jul 15, 2018 8:51 pm 
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Simple arithmetic, 52 x 2 +6, so the chain advances (or retards) 6 teeth every revolution of the chain.

Keith


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PostPosted: Sun Jul 15, 2018 9:20 pm 
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Crystal :facepalm:


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PostPosted: Sun Jul 15, 2018 9:25 pm 
GOLD | PoTM | Rider | rBOTM
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Retards.


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