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Old 04-24-07, 02:30 PM   #1
MarkSch
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converting dura-ace 8 to 9 speed

I'd like to convert from Dura-Ace 8 speed to 9 speed, and wondering about the bare minimum number of changes.

I understand that my venerable 8 speed deraileur has a different cable pull, and wouldn't work with a 9 speed brifter...how about my hubs? These are roughly 1992 HG era freehubs...can I put a 9 speed cassette on there? If that's the case, I would need just the cassette, RD, brifters, chain...how about the FD, will my 8 speed still work OK with the slightly narrower chain (I presume cage width is slightly different?). I read on Sheldon Brown's site that my crankset should be OK.

Thanks!

mark
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Old 04-24-07, 03:09 PM   #2
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You'll need new shifters, cassette, derailleurs, and chain. You may as well upgrade to 10-speed since it will require the same replacements. With a 10-speed cassette you'll need a spacer behind the cassette, these are standard equipment.

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Old 04-24-07, 03:49 PM   #3
Bill Kapaun
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" I understand that my venerable 8 speed deraileur has a different cable pull"
Cable pull is in the SHIFTER!
Your current der should be fine.
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Old 04-24-07, 04:06 PM   #4
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PM me if you want to sell your 8 speed stuff. I have a CX bike that is hungry for 8 speed parts.
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Old 04-24-07, 04:21 PM   #5
Al1943
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Quote:
Originally Posted by Bill Kapaun
" I understand that my venerable 8 speed deraileur has a different cable pull"
Cable pull is in the SHIFTER!
Your current der should be fine.
Not really, pre 9-speed Dura-Ace derailleurs have a unique proprietary throw ratio, as well as a unique cable pull. 8-speed D-A derailleurs need to be mated with 8-speed D-A shifters. They are not compatible with other Shimano shifters or cassettes although they can be made to work by using a non-standard cable routing.

Al
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Old 04-24-07, 04:48 PM   #6
Sheldon Brown
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Quote:
Originally Posted by MarkSch
I'd like to convert from Dura-Ace 8 speed to 9 speed, and wondering about the bare minimum number of changes.

I understand that my venerable 8 speed deraileur has a different cable pull, and wouldn't work with a 9 speed brifter...how about my hubs? These are roughly 1992 HG era freehubs...can I put a 9 speed cassette on there? If that's the case, I would need just the cassette, RD, brifters, chain...
No, you will also need new handlebar tape!

.
Quote:
Originally Posted by MarkSch
..how about the FD, will my 8 speed still work OK with the slightly narrower chain...
Yes, that will be fine.

You will see a lot of stuff about front derailer/shifter compatibility, but that's mainly a problem with triple chainring setups. Doubles are MUCH easier.

Anybody who owns any pre-1997 Dura-Ace stuff really should read my Dura-Ace compatibility page carefully: http://sheldonbrown.com/dura-ace

Sheldon "9-speed Handlebar Tape" Brown
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