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Stuffed rear derailleur



 
 
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  #1  
Old January 24th 11, 01:30 AM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default Stuffed rear derailleur

Oh well, looks like I've done it good this time.

I thought I'd try to fix that dodgy rear derailleur on my road bike by
swapping it out for a spare one I had lying around.

As usual, there is many a slip betwixt the lip and the cup, and yes, the
spare derailleur don't fit - maybe becos I had not realised that it came
from a MTB - so much so for a wannabe uber technically minded fellow
like moi I was right that first time, you know, in that I have skills
which are long dormant and it appears that I should have left it that
way whilst I was ahead

"Never mind", says I, I'll try to fix the old derailleur by banging it
and twisting it. You guessed it, the "banging" became "mangling" and the
twisting became "more mangling" and I have now "fixed" the old
derailleur - well, ok, "vandalised" is probably the more correct
description in lieu of a more robust and aggressive term (more gentle
souls might be present, you see). More previously dormant skills on
display here?

{sigh} I'll have to pull the Cannondale out of storage and go get a new
rear derailleur from Johnno at Kenso this arvo. Very annoying cos I had
cleaned and polished and oiled the Cannondale prior to storage.
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  #2  
Old January 24th 11, 01:44 PM posted to aus.bicycle
Dave Hughes
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Posts: 228
Default Stuffed rear derailleur

On Mon, 24 Jan 2011 11:30:19 +1100, Geoff Lock wrote:

As usual, there is many a slip betwixt the lip and the cup, and yes, the
spare derailleur don't fit - maybe becos I had not realised that it came
from a MTB


The fittings should be the same - the derailleur bolt is the same thread
and diameter. The exception is if you've got a super cheap derailleur that
clamps the axle and dropout. I suspect, but have never tried, that it'd be
possible to cludge the main pivot from the bolt on style into one of those.

MTB derailleurs typically have a longer cage so you can run a wider spread
of gears. It's fairly common for DH riders to run a road derailleur so
that the cage is less likely to get caught, and it works if you only have
a single chainring. It's also possible to run MTB derailleurs on road
bikes to allow silly large gear ranges (e.g. running an MTB 11-30 cluster
for big climbs).

The only other gotcha is that there are a couple of different indexing
systems around. I think Campagnolo has a different spacing to Shimano, but
I'm not sure if the ratio at the derailleur is different. I know 8sp and
9sp are different widths, and 10 is different again. SRAM and Shimano are
also incompatible.

--
Dave Hughes -
"Forty-two" - Deep Thought

  #3  
Old January 24th 11, 08:10 PM posted to aus.bicycle
Geoff Lock[_2_]
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Posts: 475
Default Stuffed rear derailleur

On 24/01/2011 11:44 PM, Dave Hughes wrote:
On Mon, 24 Jan 2011 11:30:19 +1100, Geoff Lock wrote:

As usual, there is many a slip betwixt the lip and the cup, and yes, the
spare derailleur don't fit - maybe becos I had not realised that it came
from a MTB


The fittings should be the same - the derailleur bolt is the same thread
and diameter. The exception is if you've got a super cheap derailleur that
clamps the axle and dropout. I suspect, but have never tried, that it'd be
possible to cludge the main pivot from the bolt on style into one of those.


The replacement derailleur didn't have the clamp - it screws onto the
dropout(?).

MTB derailleurs typically have a longer cage so you can run a wider spread
of gears. It's fairly common for DH riders to run a road derailleur so
that the cage is less likely to get caught, and it works if you only have
a single chainring. It's also possible to run MTB derailleurs on road
bikes to allow silly large gear ranges (e.g. running an MTB 11-30 cluster
for big climbs).


The MTB derailleur I was trying to use is waayyy toooo big and keeps
banging into the frame when I try to manually test the range of
movement. Also, the cable doesn't seem to go in at the correct angle.

Maybe I should have another go at fitting the MTB derailleur on the road
bike seeing as you seem to suggest that it is possible.

I am not too sure what you mean by an 11-30 cluster - 11T for smallest
gear and 30T for largest gear, perhaps?

Never mind, I am told that I can have a Suntour rear derailleur for my
7-speed for about $40-50.

The ones I saw today were Shimanos for 9 and 10 speed gear sets(?) and
cost around $150. Maybe I should just toss out that newish 7-speed I
bought and get me a new rear derailleur AND a 10 speed cassette but I
suspect I'll need a new chain as well due to closer tolerances between
the gears.

The only other gotcha is that there are a couple of different indexing
systems around. I think Campagnolo has a different spacing to Shimano, but
I'm not sure if the ratio at the derailleur is different. I know 8sp and
9sp are different widths, and 10 is different again. SRAM and Shimano are
also incompatible.


No indexing on my ****ty 40-year old bike Plain ole friction gearing
system using crappy levers on the down tube but it works, it works
  #4  
Old January 24th 11, 08:56 PM posted to aus.bicycle
Techo
external usenet poster
 
Posts: 3
Default Stuffed rear derailleur

Becos is incorrect spelling from the USA. It is spelt because, please stop
butchering the english language in this country.



"Geoff Lock" glock@home wrote in message
...
Oh well, looks like I've done it good this time.

I thought I'd try to fix that dodgy rear derailleur on my road bike by
swapping it out for a spare one I had lying around.

As usual, there is many a slip betwixt the lip and the cup, and yes, the
spare derailleur don't fit - maybe becos I had not realised that it came
from a MTB - so much so for a wannabe uber technically minded fellow
like moi I was right that first time, you know, in that I have skills
which are long dormant and it appears that I should have left it that
way whilst I was ahead

"Never mind", says I, I'll try to fix the old derailleur by banging it
and twisting it. You guessed it, the "banging" became "mangling" and the
twisting became "more mangling" and I have now "fixed" the old
derailleur - well, ok, "vandalised" is probably the more correct
description in lieu of a more robust and aggressive term (more gentle
souls might be present, you see). More previously dormant skills on
display here?

{sigh} I'll have to pull the Cannondale out of storage and go get a new
rear derailleur from Johnno at Kenso this arvo. Very annoying cos I had
cleaned and polished and oiled the Cannondale prior to storage.



  #5  
Old January 25th 11, 03:22 AM posted to aus.bicycle
F Murtz[_2_]
external usenet poster
 
Posts: 193
Default Stuffed rear derailleur

Techo wrote:
Becos is incorrect spelling from the USA. It is spelt because, please stop
butchering the english language in this country.


Becos is not incorrect spelling from the USA. "Spelt" is incorrect
If you are going to waste time correcting people you should get it right.




"Geoff Lock"glock@home wrote in message
...
Oh well, looks like I've done it good this time.

I thought I'd try to fix that dodgy rear derailleur on my road bike by
swapping it out for a spare one I had lying around.

As usual, there is many a slip betwixt the lip and the cup, and yes, the
spare derailleur don't fit - maybe becos I had not realised that it came
from a MTB - so much so for a wannabe uber technically minded fellow
like moi I was right that first time, you know, in that I have skills
which are long dormant and it appears that I should have left it that
way whilst I was ahead

"Never mind", says I, I'll try to fix the old derailleur by banging it
and twisting it. You guessed it, the "banging" became "mangling" and the
twisting became "more mangling" and I have now "fixed" the old
derailleur - well, ok, "vandalised" is probably the more correct
description in lieu of a more robust and aggressive term (more gentle
souls might be present, you see). More previously dormant skills on
display here?

{sigh} I'll have to pull the Cannondale out of storage and go get a new
rear derailleur from Johnno at Kenso this arvo. Very annoying cos I had
cleaned and polished and oiled the Cannondale prior to storage.




  #6  
Old January 25th 11, 04:26 AM posted to aus.bicycle
Geoff Lock[_2_]
external usenet poster
 
Posts: 475
Default Stuffed rear derailleur

On 25/01/2011 6:56 AM, Techo wrote:
Becos is incorrect spelling from the USA. It is spelt because, please stop
butchering the english language in this country.


G'day, Techo I am assuming you are objecting to the way in which I am
spelling "derailleur"? How do you spell it and which country are you from?

I like using the "derailleur" spelling becos I think it makes me sound
more knowledgeable in matters cycling and I appear more trendy as I
cannot afford Lycra clothing to make me so.

I am aware of the raging controversy between "derailleur" and
"derailler" and I include a link from the late, great Sheldon Brown for
your perusal.

http://www.sheldonbrown.com/derailer.html

Incidentally, are you a Schrader valve or a Presta Valve person? I am a
bit embarrassed that I can't offer an opinion myself as I am not quite
out of the Woods yet
  #7  
Old January 25th 11, 05:05 AM posted to aus.bicycle
Geoff Lock[_2_]
external usenet poster
 
Posts: 475
Default Stuffed rear derailleur

On 25/01/2011 1:22 PM, F Murtz wrote:
Techo wrote:
Becos is incorrect spelling from the USA. It is spelt because, please
stop
butchering the english language in this country.


Becos is not incorrect spelling from the USA. "Spelt" is incorrect
If you are going to waste time correcting people you should get it right.


In between posting my response to Techo and responding to you, I
realised what Techo was really carrying on about

I noticed that you had put quotation marks on "Spelt" and after
re-reading Techo's post with the quotation marks in the appropriate
places, viz "becos" and "because", Techo's post made a bit more sense.

Obviously, due to my rather appalling command of the English language, I
can neither comment on syntaxual nor grammatical errors in Techo's post.
For example, what I call "quotation marks" are, in fact, really known as
"rabbit ears" to the greater unwashed like myself. You see, I
generally speak with a Westie accent (Liverpool Sydney - Green Valley to
be more precise) or an Eastern Surburbs Westie accent (a la Kingsford
Sydney - actually, Pagewood and thereabouts).

Damn!! I tort .. eeerrr.. sorry .. thought, that he/she/it was objecting
to my spelling of "derailleur". Never mind, I got me a free kick against
the Lycra crowd
  #8  
Old January 25th 11, 05:42 AM posted to aus.bicycle
Dave Hughes
external usenet poster
 
Posts: 228
Default Stuffed rear derailleur

On Tue, 25 Jan 2011 06:10:19 +1100, Geoff Lock wrote:

The replacement derailleur didn't have the clamp - it screws onto the
dropout(?).


If it's got a single bolt coming out of the top then it's the standard
from mid-level to top of the range derailleurs. If it's got a metal plate
that is clamped by the rear wheel and has a second bolt that threads into
a plate in the drop-out, it's cheap. It may still work well despite being
cheap, but they're fiddlier.

I am not too sure what you mean by an 11-30 cluster - 11T for smallest
gear and 30T for largest gear, perhaps?


Yep. You can even go out to around 36 as the largest for MTBs with 29"
wheels. Standard road bikes tend to be 12-25ish, depending on the bike and
rider.

Never mind, I am told that I can have a Suntour rear derailleur for my
7-speed for about $40-50.


http://www.phantomcycles.com.au/p-85...ed-silver.aspx

http://www.phantomcycles.com.au/p-71...ed-silver.aspx

I have no relation to that website, other than I've ordered stuff from
Kerry a few times and found him to be a really nice bloke and he's quick
to get stuff to you. I'm fairly sure I've run 9sp derailleurs with 8sp
chains, which are the same as 7sp, but it's been a long time.

If those don't look like they've got the right attachment (and if your
bike is 40 years old), you might be after something more like the RD-TX31
he
http://www.moruyabicycles.com.au/con...r-shimano.html

Most bike shops will be able to get them, but may not have them in stock.

The expensive derailleurs do tend to shift more reliably with indexing,
last longer, and are lighter. They also reduce the weight in your hip
pocket quite a bit.

--
Dave Hughes -
The plural of 'anecdote' is not 'data' - seffala, /.

  #9  
Old January 25th 11, 10:07 AM posted to aus.bicycle
F Murtz[_2_]
external usenet poster
 
Posts: 193
Default Stuffed rear derailleur

Geoff Lock wrote:
On 25/01/2011 1:22 PM, F Murtz wrote:
Techo wrote:
Becos is incorrect spelling from the USA. It is spelt because, please
stop
butchering the english language in this country.


Becos is not incorrect spelling from the USA. "Spelt" is incorrect
If you are going to waste time correcting people you should get it right.


In between posting my response to Techo and responding to you, I
realised what Techo was really carrying on about

I noticed that you had put quotation marks on "Spelt" and after
re-reading Techo's post with the quotation marks in the appropriate
places, viz "becos" and "because", Techo's post made a bit more sense.

Obviously, due to my rather appalling command of the English language, I
can neither comment on syntaxual nor grammatical errors in Techo's post.
For example, what I call "quotation marks" are, in fact, really known as
"rabbit ears" to the greater unwashed like myself. You see, I
generally speak with a Westie accent (Liverpool Sydney - Green Valley to
be more precise) or an Eastern Surburbs Westie accent (a la Kingsford
Sydney - actually, Pagewood and thereabouts).

Damn!! I tort .. eeerrr.. sorry .. thought, that he/she/it was objecting
to my spelling of "derailleur". Never mind, I got me a free kick against
the Lycra crowd




In trying to correct you he was showing his own ignorance.
  #10  
Old January 25th 11, 10:08 AM posted to aus.bicycle
Tomasso[_7_]
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Posts: 11
Default Stuffed rear derailleur


"Geoff Lock" glock@home wrote in message ...

Never mind, I am told that I can have a Suntour rear derailleur for my
7-speed for about $40-50.


I have a couple of 35 year old suntour derailleurs (large cage and small cage). That
would keep you true to the vintage. The large cage is on a bike atm, but I have a
shimano 105 derailleur to replace it (to work with some shimano index shifters, and
haven't made the time for the change).

Probably you'd like large cage. Would be no charge...

But could you meet up in Ultimo?

Tomasso.
 




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