Can 8 Speed SORA shift a 7 Speed Freewheel?

[Sir Ridesalot]

Hi there.

Well, the paint has fully cured and I'm all ready to reassemble my old
Miele Uno bicycle. I was looking at the parts I took off it and
realized that the rear wheel is a Shimano *SEVEN* speed *FREWHEEL* and
not an 8 speed cassette as I thought.

My Camapy Mirage Ergos shifted this very nicely using a Shimano ACERA
rear derailleur.

I recently acquired SORA 8 Speed brifters and SORA rear derailleur.
Will those shift the Shimano 7 speed freewheel well?

If not, I think I will just use the Ergos and the SORA rear derailleur
until I get some new wheels for it.

BTW, here is the link to the repainted MIELE Uno frame if you want to
see it.

http://www.flickr.com/photos/73832500@N00/3840918588/

Thanks for the advice.

Cheers from Peter

[TT]

The spacing (technically "pitch") between sprockets on a cassette is
different for 7 (5mm) and 8 (4.8mm) speed cassettes, this means a
shimano 8 speed shifter pulls a hair less cable per click than a 7
speed shifter. I have physically seen setups where the shifter is more
speeds than the cassette and while it will technically function and
shift, it may be a bit janky in that you might not be able to cleanly
hit every cog on the cassette, one or two might give you a little
chain rub on the higher or lower cog or a tendency to shift by itself
under load or due to lateral movement of the chain on uneven terrain.

-Tom

-Tom

[bjwe...@gmail.com]

On Aug 20, 1:41 pm, Sir Ridesalot <i_am_cycle_pat...@yahoo.ca> wrote:

> Hi there.
>
> Well, the paint has fully cured and I'm all ready to reassemble my old
> Miele Uno bicycle. I was looking at the parts I took off it and
> realized that the rear wheel is a Shimano *SEVEN* speed *FREWHEEL* and
> not an 8 speed cassette as I thought.
>
> My Camapy Mirage Ergos shifted this very nicely using a Shimano ACERA
> rear derailleur.
>
> I recently acquired SORA 8 Speed brifters and SORA rear derailleur.
> Will those shift the Shimano 7 speed freewheel well?
>
> If not, I think I will just use the Ergos and the SORA rear derailleur
> until I get some new wheels for it.
>

Yes, you can shift 7 speed Shimano with an 8 speed
Shimano shifter, if you set it up correctly. The cog to cog
spacings are 5mm and 4.8mm, so if you set it up
on the middle cog you're only ~0.6mm out on the
inner or outer cog.

This is more frequently said to work than using the
combo of 8 speed Campy shifters and a Shimano
rear der, which you may have been pretty lucky
to make work.

Ben

[Sir Ridesalot]

On Aug 20, 5:59 pm, "b...@mambo.ucolick.org" <bjwei...@gmail.com>
wrote:

> Ben- Hide quoted text -
>
> - Show quoted text -

Hi there.

I see that Iforgot to mention that my MIRAGE Ergo levers are 9 Speed.
That is why they work so well with the 7 Speed Shimano. Note, I did
use the alternate cable routing to do that.

If I had known at the time I was grting my Mirage and Veloce
components (2001) that 9 Speed Ergos would shift 7 Speed Shimano if I
used a Shimano rear derailleur I never would have bought the Veloce
wheels, bottom bracket and triple crankset to replace my Shimano ones.

I just put the stem, the handlebars and the ERGO levers on the
bicycle. I have another stem and bars I could put the SORA Brifters
on. Seeing as I have *NOT* connected the cables yet should I swap out
the Shimano SORA Brifters for the ERGOS? Will that give me at least as
good shifting as I get with the ERGOS?

Thanks again and cheers from Peter