Re: upgrading to 9 speed


Dave Mayer wrote:
Eric: answers in text:

"Wreckless Eric" <gogo@xxxxxxxx> wrote in message
news:C028BF3Cyf@xxxxxxxxxxx
Hello,

I'm currently running early "pointy" style 8 speed Ergo shifters,
an older style (tension adjuster on the back) 9 speed compatible
Campy rear derailleur, and 8 speed Shimano cassette hubs with a
Campy-compatibility spacer kit. I'm pretty sure my chain is 9
speed compatible.

Chains last 6 months max. Replace it anyway.

I've read recently that Shimano 8 speed hubs will take a 9 speed
cassette. I've also read that Shimano and Campy 9 speed spacing
is the same.

Shimano 8-speed hubs will take a Shimano 9-speed cassette. Unless it is the
first generation of Shimano 8-speed Dura-Ace hubs from about 15 years ago.
Campy and Shimano 9-speed cog spacing is different: 4.55mm cog center to
center for Campy, and 4.34mm for Shimano. In practice, this is close
enough, especially if you adjust the rear derailleur to be centered on a
middle cog. That way, the error at each end of the cogset is minimized.

It would seem that I should be able to upgrade to 9 speed by
putting in the correct early-style Campy 9 speed shifter slug, a
set of 9 speed Shimano sprocket spacers, and one more cog for my
wheel. are the rear cogs themselves the same width?

Something to think about is what is your generation of Campy 9-speed rear
derailleur. If it is post-2000, then it has the new mechanical advantage of
1.50 to 1. If you match this with a old 9-speed index ring (pre-2001), you
will get derailleur travel that will more closely match Shimano 8-speed
spacing (4.8mm) than Shimano 9-speed. If you want to make this work, an
older Campagnolo derailleur is definitely better.

The only 9s shift disc that will work in his lever is the one made in
1997, the last year of old shape ergo-A newer 9s cisc from 1998/9 will
not fit. He needs EC-RE-113. All this discussion about pre and post
2001 is a not important, since in reality, any ERGO will work with any
Campag rear derailleur, in actual practice. 8 with 10, 9 with 8, 10
with 8, etc.

BTW: I have Campy 8 and 9 speed systems. For the minimal benefit of another
gear, I don't think the "upgrade" would be worth the effort.

Cog width is close from 6-9 speeds. Between 1.8 and 2.0mm. What does
change is the width of the spacers. Practically you can mix loose Shimano
cogs.

Would I
need to add a spacer on my axle to get more clearance between my
smallest cog and the dropout.

Unlikely. 8 and 9 speed should be the same as far as the distance between
the first cog and the dropout.

-Eric

--
Miss Baby was alright until me and Junior turned her head around.

.

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  • Re: Campagnolo vs Shimano 10 Speed Hub
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