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9 speed rear derailleur



 
 
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  #1  
Old December 8th 03, 07:40 PM
Andrew Karre
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Default 9 speed rear derailleur

Since the biggest and smallest cogs aren't any farther apart on a
ten-speed cassette, what is the obstacle to using a nine-speed rear
derailleur with a ten-speed shifter, cassette, and chain? Is it the
pulleys?

AK
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  #2  
Old December 8th 03, 09:50 PM
Sheldon Brown
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Default 9 speed rear derailleur

Andrew Karre wrote:

Since the biggest and smallest cogs aren't any farther apart on a
ten-speed cassette, what is the obstacle to using a nine-speed rear
derailleur with a ten-speed shifter, cassette, and chain? Is it the
pulleys?


No, it's the marketing.

Sheldon "They Want Your Money" Brown
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| Readers of a historical bent may be interested in my |
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Phone 617-244-9772 FAX 617-244-1041
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  #3  
Old December 9th 03, 01:27 AM
Pete Biggs
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Default 9 speed rear derailleur

Sheldon Brown wrote:

Since the biggest and smallest cogs aren't any farther apart on a
ten-speed cassette, what is the obstacle to using a nine-speed rear
derailleur with a ten-speed shifter, cassette, and chain? Is it the
pulleys?


No, it's the marketing.

Sheldon "They Want Your Money" Brown


Is that the reason, seriously? Or is it because they genuinely want their
customers to have the best and are terribly consevative?

2001+ 9-speed rear derailleurs are virtually the same as the 10-speed
versions (geometry and ratio is the same, AFAIK). Effective width of 10sp
pulley wheels is slightly narrower (different spacers). From memory,
difference is 0.2mm or 0.4mm.

~PB


  #4  
Old December 9th 03, 02:00 PM
Qui si parla Campagnolo
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Default 9 speed rear derailleur

andrew- Since the biggest and smallest cogs aren't any farther apart on a
ten-speed cassette, what is the obstacle to using a nine-speed rear
derailleur with a ten-speed shifter, cassette, and chain? Is it the
pulleys? BRBR

No obstacle, just use it whether it be shimano or Campagnolo. no need to change
anything. The shifter makes sure the chain moves the correct amount these days.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"
  #5  
Old December 9th 03, 02:00 PM
Qui si parla Campagnolo
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Default 9 speed rear derailleur

Pete- Effective width of 10sp
pulley wheels is slightly narrower (different spacers). From memory,
difference is 0.2mm or 0.4mm. BRBR

Nope, they are even marked 9/10s for Campagnolo...

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"
  #6  
Old December 9th 03, 04:18 PM
Pete Biggs
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Default 9 speed rear derailleur

Qui si parla Campagnolo wrote:
Pete- Effective width of 10sp
pulley wheels is slightly narrower (different spacers). From memory,
difference is 0.2mm or 0.4mm. BRBR

Nope, they are even marked 9/10s for Campagnolo...


That's the actual jockey wheels isn't it? I believe the spacers that fit
into them are different.

~PB


  #7  
Old December 9th 03, 04:41 PM
Pete Biggs
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Default 9 speed rear derailleur

Pete Biggs wrote:
Qui si parla Campagnolo wrote:
Pete- Effective width of 10sp
pulley wheels is slightly narrower (different spacers). From memory,
difference is 0.2mm or 0.4mm. BRBR


Now checked: Difference is 0.4mm

Nope, they are even marked 9/10s for Campagnolo...


By effective width, I mean width of jockey wheel plus spacers (washers or
whatever you call them). I believe the spacers are different. The actual
jockey wheels may be the same.

2004 Veloce 9-speed total width: 8.8mm, 10-speed Veloce: 8.4mm. See
www.campagnolo.com/pdf/spares04_A.pdf - pdf page 33 - zoom in close.

~PB


  #8  
Old December 10th 03, 02:26 PM
Qui si parla Campagnolo
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Default 9 speed rear derailleur

pete- That's the actual jockey wheels isn't it? I believe the spacers that
fit
into them are different. BRBR

I'll look but i think the packaged pulleys, complete, are 9/10..with the inner
bushings and covers.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"
  #9  
Old December 10th 03, 03:09 PM
Robin Hubert
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Default 9 speed rear derailleur


"Qui si parla Campagnolo" wrote in message
...
pete- That's the actual jockey wheels isn't it? I believe the spacers

that
fit
into them are different. BRBR

I'll look but i think the packaged pulleys, complete, are 9/10..with the

inner
bushings and covers.


There are 8, 9, and 10sp Campag. pulleys available (source, QBP website). I
know of no 9/10sp pulleys (strange, as the new derailleurs are s'posed to be
9/10).

Robin Hubert


  #10  
Old December 10th 03, 05:02 PM
Qui si parla Campagnolo
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Default 9 speed rear derailleur

robin- I
know of no 9/10sp pulleys BRBR
Looking at the pulley, w/o the plates, they say 9/10.

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"
 




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