First, you always want to make sure you can reach the big-ring,
big-sprocket combo. You might not ever use it (and you shouldn't),
but if you accidentally shift into it (sudden red light as your
cruising along in the big ring) and you can't reach it, you might
destroy your rear derailer. That being said, Sheldon's site has good
advice. I have always used the method of, with the chain threaded
normally, carefully shifting to the big-big combo, then check that
you could remove one link pair when the derailer is fully
extended. You need this little bit of slack so the chain can ride up
and onto the big ring before settling onto it. More slack is OK as
long as the derailer can take up the slack. Even if it can't, you
may get chain suck and skipping, and you'll definitely hear a lot of
complaining from your drivetrain, but ay least you won't permanently
destroy things.
Kerry Kunsman
San Diego, CA
At 02:24 PM 10/19/2012, PATRICK MOORE 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 the 9 sp chain it
replaced. It will cover the Big/Big combo (46/34 -- note that the 34
is in the #7 position) without grumbling but the cage is angled
considerably forward. The next-to-biggest cog is a 28, I think, and it
handles that fine.
No chain suck on todays mixed dirt/pavement 26 mile ride, so perhaps
the added tension is helping keep things in place?
At any rate, given the above -- and the fact that I never use the
46/34 anyway; I do use the 46/28 occasionally -- any reason to think
that I ought to add more links?
--
Vote early, vote often, vote Rhinoceros!
http://tinyurl.com/d7muj2t
-------------------------
Patrick Moore, Albuquerque, NM, USA
For professional resumes, contact Patrick Moore, ACRW
http://resumespecialties.com/index.html
-------------------------
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