Problems with rear derailleur

Phil said:

Hello,

I recently bought some new megarange 7speed cogs and a megarange rear
derailleur, the problem i'm having is that even with the b-tension
adjustment screw tightened as much as possible the derailleur still
cannot clear the largest sprocket.

Any suggestions would be great

Get a longer screw. (Or, try reversing the one you have now; sometimes the
head adds enough length to solve problem.)

Sorni

Phil:

Quoted message said:

I recently bought some new megarange 7speed cogs and a megarange rear
derailleur, the problem i'm having is that even with the b-tension
adjustment screw tightened as much as possible the derailleur still cannot
clear the largest sprocket.

Chain's too long.

App

"App" wrote: Chain's too long.
^^^^^^^^^^^^^^^
If the chain were too long, the deraileur would fail to take out all the
slack, particularly in the small-small combination. I go with Bill's
advice. You need to raise the guide pulley away from the large cog a little
more.

Leo suggested:

Quoted message said:

If the chain were too long, the deraileur would fail to take out all the
slack, particularly in the small-small combination.

I beg to differ. The chain won't necessarily go slack if it is one or
two links too long. Before messing with anything, check the chain
length. Sheldon has good info on setting up chain length.

Easy to check, easy to fix if wrong.

App

chain's too long

datak said:

chain's too long

See, I knew it. gene's on board. What do you have to say to that, Leo
;-)

Now all I need is Red Cloud's white penis power and world domination is
mine!

Bwa ha ha ha ....

App

app is connected to a mob mindreader? local or from boston? local
mindreaders are actively involved in narcotics smuggling and the
addiction of young people to narcotics for the purpose of enslavement
to the mob in prostitution. i participate in the flow as a
predictor-for Katrina-NO as an example. this drives the local mob
people, who read but are fundementally retarded, crazier.

X X X X X X X X

so i was about to tell this joke

a shade tree 102 joke!

two young men with bandaged crotches are laying on beds in a hospital
ward.
doctor comes in and sez to one-
"your circumcision is perfect!!"
and the other guy leans up starTled and shouts
"that's the word I was thinking about!!"

the genesis for this joke is lost in my time
it might be about elenor roosevelt or something to do with the DC YMCA?

Quoted message said:

so i was about to tell this joke

a shade tree 102 joke!

two young men with bandaged crotches are laying on beds in a hospital
ward.
doctor comes in and sez to one-
"your circumcision is perfect!!"
and the other guy leans up starTled and shouts
"that's the word I was thinking about!!"

Hold on to your day job like grim death.

Sorni
(see? I did it so you didn't have to)

"App" wrote: See, I knew it. gene's on board. What do you have to say to
that, Leo
^^^^^^^^^^^^^^^^
Sometimes I'm wrong when I think I'm wrong. So let's look at the facts:
The OP wrote, "Hello,I recently bought some new megarange 7speed cogs and a
megarange rear derailleur, the problem i'm having is that even with the
b-tension adjustment screw tightened as much as possible the derailleur
still cannot clear the largest sprocket." He doesn't mention buying a new
chain, so I think we can assume that he is using the old one, which
presumably was okay with the old setup. Now, tell me how putting in a
mega-low cog and a dreaileur with a longer arm would make the chain too
long. And then, tell me also how too long a chain would cause the deraileur
to rub the side of the lowest cog.

I still go with Bill's diagnosis.

<snippage of Leo's concerns regarding my diagnosis>

Let's wait and see what Phil says about the resolution of his problem.
BTW, having gene support my diagnosis is not a plus in my book, hence,
the winky face.

You already made assumptions that weren't in his posting, i.e., that
his new der has a longer cage than his old, that the new cogset is any
different from the old one, etc....

I'll wait for Phil, if he does, to respond.

Let the correct diagnosis "win"!

App

the pre post news is a repeat problem: app falls into the category, and
as you 'have' seen, its a serious problem

so, don't cut the chain until the problem is thorowlee examined,
in this case, ONE of the other variable (without permanent
disfiguration)connections is the cable
WHICH HAS A CABLE ADJUSTER!

so you have a roblem. write down each connection to the problem, and
the connnections to the direct connection.
which are variable: a. by design
b. thru wear
c. falling out of adjustment
d. snafu
to establish a list-examining the mechanism by sight sound and smell,
whatever is app, upside down ect. wiggle jiggle pull and bash
then begin solving the problem.

"App" wrote: (clip) You already made assumptions that weren't in his
posting, i.e., that his new der has a longer cage than his old, that the new
cogset is any different from the old one, etc....
(clip) Let the correct diagnosis "win"!
^^^^^^^^^^^^^^^^^
Thanks for clarifying your "winky face." I knew something was going on
there, but I didn't quite understand. As far as assumptions are concerned,
I think my only one is that he is using the original chain. As far as the
megarange cogset and deraileur are concerned--"Megarange" refers to an
ultralarge bottom gear. The Megarange deraileur would accordingly have to
have a longer arm, since it takes more chain to wrap around the Megarange
cog. That is why I doubt that the chain is too long. It takes MORE chain,
not less, to operate with the new setup he installed.

Whoever "wins" this debate get to say "I toldya so," in this public forum.
;-)

Quoted message said:

Whoever "wins" this debate get to say "I didn't screw myself by cutting the chain caws 3 posters knee jerked (off dense wood) and said so" sheeet getting a laugh here is ruff.

the answers to many question posts lie not in an immediate
solution(presently an endemic word useage)-who's there? who's asking
and framing the problem? the guy who's not able to figure it out.
the solution lies in laying out an approach to resolving the problem.
unless you're operating on the LBS Golden Sludge level where the
rotoflex immediately gives the solution to "how do I hook up a schwinn
roller brake to the 10 speed deore grips and generate power for the
Swiis headlamp".

Quoted message said:

Quoted message said:

Whoever "wins" this debate get to say "I didn't screw myself by
cutting the chain caws 3 posters knee jerked (off dense wood) and
said so" sheeet getting a laugh here is ruff.

the answers to many question posts lie not in an immediate
solution(presently an endemic word useage)-who's there? who's asking
and framing the problem? the guy who's not able to figure it out.
the solution lies in laying out an approach to resolving the problem.
unless you're operating on the LBS Golden Sludge level where the
rotoflex immediately gives the solution to "how do I hook up a schwinn
roller brake to the 10 speed deore grips and generate power for the
Swiis headlamp".

Now more than ever, "Get a longer screw."

here's another one-it doesn't work so the manufacturer afterspending 7
million developing the gizmo screwed the porkcess good and what we
really need here as a longer screw or longer boats...

dear phil-how is the front deray adjustment going?

jus treceived an email from perry and he agrees with me

Tis the rear derailleur i'm having problems with,

I did install a new chain at the same time but don't think that is the
problem as I did the no derailleur largest chainring and largest sprocket
add 2 links method. And I don't think I could shorten it anymore because
theres hardly any room for the rear derailleur to move when on the largest
chainring and sprocket.

I would like to try using a longer screw however so far I haven't been able
to find one with the same thread

Thankyou for all your responses!

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

Quoted message said:

dear phil-how is the front deray adjustment going?

Phil said:

Tis the rear derailleur i'm having problems with,

Of course it is. App's nuts.

Quoted message said:

I did install a new chain at the same time but don't think that is the
problem as I did the no derailleur largest chainring and largest
sprocket add 2 links method. And I don't think I could shorten it
anymore because theres hardly any room for the rear derailleur to
move when on the largest chainring and sprocket.

App thinks your chain is too LONG, not short. (Of course, it's a too
/short/ chain that /could/ cause your symptom, but not in this case with the
changes you made.)

Quoted message said:

I would like to try using a longer screw however so far I haven't
been able to find one with the same thread

Try what I suggested in the very first reply: REVERSE it (screw it in from
the other side).

Quoted message said:

Thankyou for all your responses!

We're givers ;-)