"Kevin" <
[email protected]> wrote in message
news:[email protected]...
> Is there any advantage/disadvantage for choosing a 9 or a 10?
Advantages of choosing 9 speed: Much cheaper cassettes, much cheaper chain, which doesn't wear out
as quickly. Choice of a large number of other manufacturers chains, which often work better and are
cheaper than the Campy ones.
Advantages of choosing 10 speed: An extra bailout gear, pose value? Pose value probably worked back
when they first introduced ten speed, but there are so many of them around now you really need the
carbon crankset and seatpost to qualify as a proper poser
> I'm a bit concerned about the extreme dish that the 10 requires,
Ten speed and nine speed share the exact same hubs. The differences between them are as follows:
The cassette, which uses narrower sprockets and narrower spacers to squeeze yet another sprocket
in, The chain, which is narrower to work with the cassette, The right ergo, which has 10 notches
on the indexing cog rather than 9, The rear derailleur, which has almost imperceptibly narrower
pulleys, The large chainring, which is offset to the left by 0.3mm, The front derailleur, which
has a plastic insert to make it work better with the narrower chain.
Just because the higher end Campy groups are sold as ten speed doesn't mean you have to run them
that way. In order to change a ten speed group to nine speed takes about 10 minutes work for a
decent mechanic. All that needs to be done is to change the ergo cog, and substitute a nine speed
cassette and chain. The bike shop should do this for free, as they're making on the deal, by giving
you a cheaper chain and cassette. The plastic insert can be popped out of the front derailleur in
seconds, and the differences in the chainring and derailleur pulleys are so slight that they work
equally well with nine or ten speeds. So don't for a moment think you're forced to the bottom of the
line groups because you want nine speed.
> what about future compatibility issues?
Campy stopped making eight speed groups about seven or eight years ago, yet still make cassettes for
those groups. Even if Campy were to stop making all nine speed parts tomorrow, it wouldn't mean a
nine speed group is orphaned. All you would need to do is change the ergo cog for a ten speed one,
and put on a ten speed cassette and chain, and off you go.
Regards,
Suzy
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Suzy Jackson
[email protected] http://www.suzyj.net