Rivendell's method at 3:44 in this video:
http://www.youtube.com/watch?v=gpPz8K4laFE
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That method would not work for me. My drivetrain is configured for
an extended range and there is no way even a long cage derailer can
wrap enough chain to go from big-big to little-little. In my granny
gear I can only use the lowest (biggest) 4 cogs until the chain goes
slack. That's OK,
I once set up a mountain bike (one of those bikes I wish I had kept:
'91 Specialized Stumpjumper Team; wonderful frame) with a 48/38/24
14-34 7 speed drivetrain using a 8 speed era Ultegra (= short cage)
rd. It worked fine, tho' it would grumble climbing onto the 34 when it
was covered in sand. I
Nick Legan, formerly of VeloNews, approaches it differently
(http://velonews.competitor.com/2011/11/bikes-and-tech/ask-nick/ask-nick-team-tactics-chain-lengths-choosing-a-new-bike-and-more_197660):
Here’s my chain sizing method for a road bike (with entirely compatible
gearing and derailleurs).
As long as it shifts smoothly into and out of the big/big combo (i.e., you
can't feel any binding) you should be good. Cage angle doesn't make much
of a difference.
I use the big-big + 1 complete link (i.e. one whole set of inner and outer
plates) rule of thumb and it's served me well. The
Thanks Doug, Andy and Jeremy. The new and shorter chain didn't suck
during its first ride, including dusty dirt, which is an improvement
over the previous, longer chain which was starting to suck more
frequently. As I said, there is no binding or grumbling when shifting
to the big/big, and there
I've always found the Park Tool site to be useful...
http://www.parktool.com/blog/repair-help/chain-length-sizing
On Oct 19, 5:24 pm, PATRICK MOORE bertin...@gmail.com wrote:
I just put a new Sachs P 48 (? Cheap, 8 speed, NIB) on the Fargo and
found that it is fully two links shorter than
Patrick:
Sheldon has a chain length procedure involving running the chain over
the big big combo but not thru the RD, plus a link or 2. Check it
out as it's been a while since I looked.
OTH, if it works, why mess with it? Sure, the RD is going to angled
out pretty good in the big big but it
Interesting question.
I've been doing my own wrenching for many years and chain length (on
derailer bikes) is one of those things that's always been eluded me. My
experience is that there seems to be some wiggle room. I tend to error on
making the chain as short as possible so that everything
