Gear adjustment

"Keith Willoughby" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've had
some problems with gear adjustment before - for a while,
it wouldn't change down from the second ring to the
smallest, but I adjusted one of the screws and it seemed
to be sorted.

I've looked at the chain as it goes through the mech, and
on the top jockey wheel, it appears to kink every few
teeth, which explains the clicking noise I was hearing
today (the chain is tapping against the jockey-wheel cage.

So, what should I look at first? Which bit makes the chain
fall off inside? Front derailler? Rear derailler?

I think David Millar knows the answer ....

Keith Willoughby said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've had
some problems with gear adjustment before - for a while,
it wouldn't change down from the second ring to the
smallest, but I adjusted one of the screws and it seemed
to be sorted.

Cable tension is also important.

Quoted message said:

I've looked at the chain as it goes through the mech, and
on the top jockey wheel, it appears to kink every few
teeth, which explains the clicking noise I was hearing
today (the chain is tapping against the jockey-wheel cage.

I don't know what you mean by "kink" if the links aren't
stiff (check that). Chain rubbing cage can be a difficult
problem to solve. Sometimes it's because something is bent
(including the hanger: bit of frame mech attaches to),
sometimes you just have to live with a bit of it.

Quoted message said:

So, what should I look at first? Which bit makes the chain
fall off inside? Front derailler? Rear derailler?

Front for front, rear for rear! :-)

I think you've got all sorts of things to look at and tinker
with. Follow the advice here: sheldonbrown.comderailerOpen ↗
adjustment.html

~PB

Keith Willoughby said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've had
some problems with gear adjustment before - for a while,
it wouldn't change down from the second ring to the
smallest, but I adjusted one of the screws and it seemed
to be sorted.

I've looked at the chain as it goes through the mech, and
on the top jockey wheel, it appears to kink every few
teeth, which explains the clicking noise I was hearing
today (the chain is tapping against the jockey-wheel cage.

So, what should I look at first? Which bit makes the chain
fall off inside? Front derailler? Rear derailler?

Depends whether it fell off at the front or the back ;-)

From the description above, it looks like it fell off at
the front. So you need to adjust the stop screws on the
front derailleur.

The kinking every few teeth sounds like you've got some
stiff links in your chain, which would also increase the
chance of the chain coming off. If it's just one poorly
joined link then it might be worth having a fiddle with a
chain tool to try and get it right. If you've got several
links then it might mean you need to lube your chain a bit
better, or you might need a new chain.

--
Danny Colyer (the UK company has been laughed out of my
reply address)
<URL:http://www.speedy5.freeserve.co.uk/danny/> "He who
dares not offend cannot be honest." - Thomas Paine

elyob said:

"Keith Willoughby" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

So, what should I look at first? Which bit makes the
chain fall off inside? Front derailler? Rear derailler?

I think David Millar knows the answer ....

You think it's my team manager's fault, then?

--
Keith Willoughby flat222.orgkeithOpen ↗ "The catcher hits
for .318 and catches every day The pitcher puts religion
first and rests on holidays"

"Keith Willoughby" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

elyob said:

"Keith Willoughby" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

So, what should I look at first? Which bit makes the
chain fall off inside? Front derailler? Rear derailler?

I think David Millar knows the answer ....

You think it's my team manager's fault, then?

Only if you can flick your chain back on with a forefinger
at 25+mph ...

Pete Biggs said:

Keith Willoughby said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've
had some problems with gear adjustment before - for a
while, it wouldn't change down from the second ring to
the smallest, but I adjusted one of the screws and it
seemed to be sorted.

Cable tension is also important.

The front cable is pretty loose. You certainly wouldn't get
a note out of it if you plucked it.

Quoted message said:

Quoted message said:

I've looked at the chain as it goes through the mech,
and on the top jockey wheel, it appears to kink every
few teeth, which explains the clicking noise I was
hearing today (the chain is tapping against the jockey-
wheel cage.

I don't know what you mean by "kink" if the links aren't
stiff (check that).

OK, but it happens more often than once per chain
revolution.

When I say 'kink', I mean that the chain seems to move a mm
or so to the outside of the jockey cage, then back again.

Quoted message said:

Chain rubbing cage can be a difficult problem to solve.
Sometimes it's because something is bent (including the
hanger: bit of frame mech attaches to), sometimes you just
have to live with a bit of it.

Quoted message said:

So, what should I look at first? Which bit makes the
chain fall off inside? Front derailler? Rear derailler?

Front for front, rear for rear! :-)

Hmm, ok. Both, then.

Quoted message said:

I think you've got all sorts of things to look at and
tinker with. Follow the advice here: sheldonbrown.comderailerOpen ↗
adjustment.html

Cheers.

--
Keith Willoughby flat222.orgkeithOpen ↗ The sky is
falling

Danny Colyer said:

Keith Willoughby said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've
had some problems with gear adjustment before - for a
while, it wouldn't change down from the second ring to
the smallest, but I adjusted one of the screws and it
seemed to be sorted. I've looked at the chain as it goes
through the mech, and on the top jockey wheel, it appears
to kink every few teeth, which explains the clicking
noise I was hearing today (the chain is tapping against
the jockey-wheel cage. So, what should I look at first?
Which bit makes the chain fall off inside? Front
derailler? Rear derailler?

Depends whether it fell off at the front or the back ;-)

From the description above, it looks like it fell off at
the front. So you need to adjust the stop screws on the
front derailleur.

It fell off at both. I was just wondering if that meant two
problems, or one problem with two results.

[...]

Cheers.

--
Keith Willoughby flat222.orgkeithOpen ↗ Freedom is
slavery

Keith Willoughby said:

It fell off at both. I was just wondering if that meant
two problems, or one problem with two results.

It's a fair enough question actually. Occasionally a problem
at the rear will trigger problems at the front, but it still
sounds like improvements could be made at both ends anyway.
Concentrate on getting each aspect working as well as
possible rather than worrying about the whole thing all the
time, is my (vague) advice.

~PB

Keith Willoughby <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've had
some problems with gear adjustment before - for a while,
it wouldn't change down from the second ring to the
smallest, but I adjusted one of the screws and it seemed
to be sorted.

I've looked at the chain as it goes through the mech, and
on the top jockey wheel, it appears to kink every few
teeth, which explains the clicking noise I was hearing
today (the chain is tapping against the jockey-wheel cage.

So, what should I look at first? Which bit makes the chain
fall off inside? Front derailler? Rear derailler?

I had the same kink/clicking noise after I had jammed the
chain against the sprockets after replacing the wheel. This
had bent over one of the teeth on the top jockey wheel of
the XT mech (they are quite soft) which was lifting the
chain each time the tooth came round. I straightened the
tooth (the top bit broke off) but I have not had any
changing/kink/clicking problems since.

in message <[email hidden]>, Keith Willoughby

(') said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've had
some problems with gear adjustment before - for a while,
it wouldn't change down from the second ring to the
smallest, but I adjusted one of the screws and it seemed
to be sorted.

I've looked at the chain as it goes through the mech, and
on the top jockey wheel, it appears to kink every few
teeth, which explains the clicking noise I was hearing
today (the chain is tapping against the jockey-wheel cage.

So, what should I look at first? Which bit makes the chain
fall off inside? Front derailler? Rear derailler?

Either. And falling off on the inside is not good news -
you can cause serious damage to your chain, wheel and
jockey arm. Both deraileurs have limit screws for each end
of their travel - these are what should prevent
overshifting your chain.

--
[email hidden] (Simon Brooke)
jasmine.org.uk~simonOpen ↗

Morning had broken, and I found when I looked that
we had run out of copper roove nails.

Simon Brooke said:

Both deraileurs have limit screws for each end of their
travel - these are what should prevent overshifting
your chain.

...If angle of front derailleur is correct.

~PB

Joe Roach said:

Keith Willoughby <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

My chain came off three times during my ride today - once
of the small ring, and twice off the biggest cog. I've
had some problems with gear adjustment before - for a
while, it wouldn't change down from the second ring to
the smallest, but I adjusted one of the screws and it
seemed to be sorted.

I've looked at the chain as it goes through the mech,
and on the top jockey wheel, it appears to kink every
few teeth, which explains the clicking noise I was
hearing today (the chain is tapping against the jockey-
wheel cage.

So, what should I look at first? Which bit makes the
chain fall off inside? Front derailler? Rear derailler?

I had the same kink/clicking noise after I had jammed the
chain against the sprockets after replacing the wheel.
This had bent over one of the teeth on the top jockey
wheel of the XT mech (they are quite soft) which was
lifting the chain each time the tooth came round. I
straightened the tooth (the top bit broke off) but I have
not had any changing/kink/clicking problems since.

That sounds promising. Thanks.

--
Keith Willoughby flat222.orgkeithOpen ↗ The snow meant
for them falls on the roadway