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Main
Date: 05 Aug 2007 09:31:06
From: Hell and High Water
Subject: Shimano Derailleur question
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I have seven cogs. Do I have to get a Shimano derailleur that is
specifically for 7?
I see Shimano Sora for 8...
Have Sora shifters, BTW.
-Bob
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Date: 07 Aug 2007 13:07:02
From: Hank Wirtz
Subject: Re: Shimano Derailleur question
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On Aug 6, 1:43 pm, Hell and High Water <tifoso...@OVEcomcast.net >
wrote:
> In article <1186429496.298434.246...@d30g2000prg.googlegroups.com>,
> h...@wirtznet.net says...
>
>
>
>
>
> > On Aug 5, 8:07 pm, Sir Ridesalot <i_am_cycle_pat...@yahoo.ca> wrote:
>
> > > 7 and 8 spacings are the same center to center.
>
> > True for Campy, not true for Shimano. 7 speed spacing for everyone was
> > 5mm. Campy8 was also 5mm but Shimano8 was 4.8mm. Every iteration since
> > has followed, Campy spacing is 0.2mm wider than Shimano.
>
> > For practical purposes, yes, you can use S8 shifters on 7-speed
> > setups, but they're not spaced the same.
>
> > The be-all, end-all article on the subject can be found here:
> >http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946
>
> > And to answer the OP's question, any Shimano index-compatible
> > derailleur will work with any shifter/cogset combo, except for 6/7/8-
> > speed Dura-Ace, with 74xx model numbers.
>
> I believe my shifters are 3300 series.
>
> My rear derailleur is not even Shimano....
>
> LBS suggested I switch to a Shimano rear to smooth things out. They
> ordered one ($30) but if it says 8-speed, I wanted to know if I should
> be concerned.
>
> I believe the derailleur they ordered is Shimano Sora, but I'm not clear
> on 7 vs. 8.
>
> Thanks!
>
> -Bob
>
> PS: What about the freewheel? I believe my
> derailleurs/chain/freewheel are suntour.- Hide quoted text -
>
> - Show quoted text -
OK, yeah, Suntour used different spacing from cog-to-cog, not even 5mm
per, so get a new one (and a chain, since they wear together) when you
replace the RD. The Sora should work fine, 6, 7, 8, 9 or 10 speed.
I'd be concerned about your front shifting, too, but if your current
setup shifts OK in the front, leave it alone.
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Date: 06 Aug 2007 12:44:56
From: Hank Wirtz
Subject: Re: Shimano Derailleur question
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On Aug 5, 8:07 pm, Sir Ridesalot <i_am_cycle_pat...@yahoo.ca > wrote:
> 7 and 8 spacings are the same center to center.
True for Campy, not true for Shimano. 7 speed spacing for everyone was
5mm. Campy8 was also 5mm but Shimano8 was 4.8mm. Every iteration since
has followed, Campy spacing is 0.2mm wider than Shimano.
For practical purposes, yes, you can use S8 shifters on 7-speed
setups, but they're not spaced the same.
The be-all, end-all article on the subject can be found here:
http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946
And to answer the OP's question, any Shimano index-compatible
derailleur will work with any shifter/cogset combo, except for 6/7/8-
speed Dura-Ace, with 74xx model numbers.
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Date: 06 Aug 2007 15:43:58
From: Hell and High Water
Subject: Re: Shimano Derailleur question
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In article <1186429496.298434.246480@d30g2000prg.googlegroups.com >,
hank@wirtznet.net says...
> On Aug 5, 8:07 pm, Sir Ridesalot <i_am_cycle_pat...@yahoo.ca> wrote:
>
> > 7 and 8 spacings are the same center to center.
>
> True for Campy, not true for Shimano. 7 speed spacing for everyone was
> 5mm. Campy8 was also 5mm but Shimano8 was 4.8mm. Every iteration since
> has followed, Campy spacing is 0.2mm wider than Shimano.
>
> For practical purposes, yes, you can use S8 shifters on 7-speed
> setups, but they're not spaced the same.
>
> The be-all, end-all article on the subject can be found here:
> http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946
>
> And to answer the OP's question, any Shimano index-compatible
> derailleur will work with any shifter/cogset combo, except for 6/7/8-
> speed Dura-Ace, with 74xx model numbers.
I believe my shifters are 3300 series.
My rear derailleur is not even Shimano....
LBS suggested I switch to a Shimano rear to smooth things out. They
ordered one ($30) but if it says 8-speed, I wanted to know if I should
be concerned.
I believe the derailleur they ordered is Shimano Sora, but I'm not clear
on 7 vs. 8.
Thanks!
-Bob
PS: What about the freewheel? I believe my
derailleurs/chain/freewheel are suntour.
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Date: 05 Aug 2007 20:09:46
From: Sir Ridesalot
Subject: Re: Shimano Derailleur question
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On Aug 5, 10:31 am, Hell and High Water <tifoso...@OVEcomcast.net >
wrote:
> I have seven cogs. Do I have to get a Shimano derailleur that is
> specifically for 7?
>
> I see Shimano Sora for 8...
>
> Have Sora shifters, BTW.
>
> -Bob
Hi there.
7 and 8 speed cassettes have the same center to center distances
between cogs. That is why you can use 7 of the 8 cogs from an 8 speed
cassette on a 7 speed freehub.
Cheers from Peter
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Date: 05 Aug 2007 20:07:50
From: Sir Ridesalot
Subject: Re: Shimano Derailleur question
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On Aug 5, 10:31 am, Hell and High Water <tifoso...@OVEcomcast.net >
wrote:
> I have seven cogs. Do I have to get a Shimano derailleur that is
> specifically for 7?
>
> I see Shimano Sora for 8...
>
> Have Sora shifters, BTW.
>
> -Bob
Hi there.
Nope. 7 and 8 spacings are the same center to center. That is why you
can use 7 of 8 cogs from an 8 speed cassette on a 7 speed body.
Cheers from Peter
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