use 8-sp DuraAce RD with ultegra 9?



ThrillBilly

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May 17, 2004
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i have a 04 ultegra 9-speed setup.

a friend has an unused 8-sp Dura-Ace rear derail (RD-7402)
that i want to install, IF it will work with my 9-sp setup.

will the 8-sp 7402 RD shift correctly with the 9-sp brifters?

yea, or nay ???

thanks in advance.
 

Fat Hack

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Nov 18, 2003
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Wait 'til the mechanics respond, but my understanding is that it won't.

When they went to 9 speed, Shimano narrowed the chain, and therefore (obviously), narrowed the spacing.

But I've been wrong before :p
 

boudreaux

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Oct 16, 2003
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Fat Hack said:
Wait 'til the mechanics respond, but my understanding is that it won't.

When they went to 9 speed, Shimano narrowed the chain, and therefore (obviously), narrowed the spacing.

But I've been wrong before :p
Well, the derailer nor the chain with have nothing to do with with it . However the pre 9 speed DA shifters and RD do haave different pull and throw ratios that make them incompatible with other shimano index stuff.
 

boudreaux

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Oct 16, 2003
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ThrillBilly said:
i have a 04 ultegra 9-speed setup.

a friend has an unused 8-sp Dura-Ace rear derail (RD-7402)
that i want to install, IF it will work with my 9-sp setup.

will the 8-sp 7402 RD shift correctly with the 9-sp brifters?

yea, or nay ???

thanks in advance.
The 8 speed DA RD has an incompatible throw ratio for the shifters. Check Sheldon Browns Dura Ace article at www.harriscyclery.com for a posssivble alternate cable mount solution.
 

Fat Hack

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Nov 18, 2003
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boudreaux said:
Well, the only 'close' part was that it doesn't work. That could have been the answer rather than the hooey.

Just "hooey" and no "BS"?

does that mean I'm improving? :p
 

ThrillBilly

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May 17, 2004
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boudreaux said:
The 8 speed DA RD has an incompatible throw ratio for the shifters. Check Sheldon Browns Dura Ace article at www.harriscyclery.com for a posssivble alternate cable mount solution.

boudreaux, S-Brown is the 1st place i always check, and had already read the cable setup info on his site.

but, it was still unclear to me if the setup was compatable. :confused:

my best guess is that it is LESS THAN OPTIMUM at best, and INcompat at worst.
 

boudreaux

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Oct 16, 2003
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ThrillBilly said:
boudreaux, S-Brown is the 1st place i always check, and had already read the cable setup info on his site.

but, it was still unclear to me if the setup was compatable. :confused:

my best guess is that it is LESS THAN OPTIMUM at best, and INcompat at worst.
The way I read it is that it's incompatible.The alternate cable mount does not solve the problem.
 

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