"8" spd derailleur with 9 spd cassette and chain
 

My wife just bought a 'cross bike with a relatively tall lowest gear
of 38x25 and 9spd Shimano 105 STI shifters and derailleurs. I'm
thinking of swapping out the rear derailer for a mtb variety to
accomodate a 32 or 34 tooth cog. I have a neglected old mtb with a
STX derailleur from about 5 years ago that was probably designed at
the time for 8 spd use. My wife also has a mtb bike purchased in 1999
with an LX derailleur that came with an 8 spd cassette. Any reason
why either of these devices wouldn't serve the purpose? I would more
than likely need a new 9 spd chain as there probably aren't enough
links in the current one.

Thanks for your advice,
Victor

PS In case you're wondering, I did in fact search through rec*tech for
similar posts but didn't get that warm fuzzy feeling. I apologize for
the unoriginality of the topic.

"8" spd derailleur with 9 spd cassette and chain
 

weinstev- My wife just bought a 'cross bike with a relatively tall lowest
gear
of 38x25 and 9spd Shimano 105 STI shifters and derailleurs. I'm
thinking of swapping out the rear derailer for a mtb variety to
accomodate a 32 or 34 tooth cog. I have a neglected old mtb with a
STX derailleur from about 5 years ago that was probably designed at
the time for 8 spd use. My wife also has a mtb bike purchased in 1999
with an LX derailleur that came with an 8 spd cassette. Any reason
why either of these devices wouldn't serve the purpose? I would more
than likely need a new 9 spd chain as there probably aren't enough
links in the current one.

Yes, the MTB rear ders you mention will work just fine with the 9s components.


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

"8" spd derailleur with 9 spd cassette and chain
 

weinstev- My wife just bought a 'cross bike with a relatively tall lowest
gear
of 38x25 and 9spd Shimano 105 STI shifters and derailleurs. I'm
thinking of swapping out the rear derailer for a mtb variety to
accomodate a 32 or 34 tooth cog. I have a neglected old mtb with a
STX derailleur from about 5 years ago that was probably designed at
the time for 8 spd use. My wife also has a mtb bike purchased in 1999
with an LX derailleur that came with an 8 spd cassette. Any reason
why either of these devices wouldn't serve the purpose? I would more
than likely need a new 9 spd chain as there probably aren't enough
links in the current one.

Yes, the MTB rear ders you mention will work just fine with the 9s components.


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

Peter,

thanks for the response. I surfed around a little more and saw that
Sheldon Brown had
provided the same advice on his website. Unfortunately, and probably
intentionally, the
various derailers are marketed as being X-spd specific.

Victor

"8" spd derailleur with 9 spd cassette and chain
 

victor- Unfortunately, and probably
intentionally, the
various derailers are marketed as being X-spd specific. BRBR

yep, don't believe everything ya read or even hear. A local bike shop told a
gent he would have to upgrade his entire 8s MTB drivetrain to 9s if he got the
new 2003/4 XTR crank...baaaalllloney like that.

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