Bicycle Mechanics - unusual cogset campagnolo and orientation question

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pstock
06-20-12, 06:19 AM
I was going through my stash of cassettes and cogsets today trying to put together a 10S Campagnolo rear wheel, I came across one batch of loose cogs and spacers that I"ve never seen before. The cogs were actually 2-parts - a small middle bit with about 20 teeth and the cog that meshed into this central bit.

Presumably the design allows more flexibility in positioning the cogs and teeth.
But one can also flip flop the cogs.

So, my questions are:
- what is this cog design?
- how does one optimally assemble a cassette when you can adjust so many ways

the last couple of photos 702-704 show one of the cogs repositioned and the teeth in slightly different positions relative to the next one.

- how do I know which side of the cog should face out? so that the slender part of the tooth is facing forwards or backwards?



Thanks as always.

Peter

ultraman6970
06-20-12, 08:24 AM
1st time i see that, not campagnolo brand for sure.
Kimmo
06-20-12, 01:26 PM
I'd guess the slender bits are meant to face backwards on top so they allow the derailleur to push the chain further.

Just try it each way and compare the shifting, it won't explode.

pstock
06-20-12, 06:15 PM
should have noted. the original lock ring says "Miche".
presumably it's a Miche design?
Drew Eckhardt
06-20-12, 07:18 PM
I was going through my stash of cassettes and cogsets today trying to put together a 10S Campagnolo rear wheel, I came across one batch of loose cogs and spacers that I"ve never seen before. The cogs were actually 2-parts - a small middle bit with about 20 teeth and the cog that meshed into this central bit.




- what is this cog design?


Marchisio Multikit.

The splined spacer design allows them to make one range of cogs which work

- With Campagnolo shifters on Campagnolo hubs
- With Shimano shifters on Shimano hubs
- With Shimano shifters on Campagnolo hubs
- With Campagnolo shifters on Shimano hubs

And it's one _big_ range of cogs:

First 11 12 13 14 15 16 18
Middle 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30
Use 12 first for second position with an 11 starting cog
Last 21 22 23 24 25 26 27 28 30



- how does one optimally assemble a cassette when you can adjust so many ways


It looks like there's one wide spline.
miamijim
06-21-12, 12:24 PM
Stamped number should face outward.

As far as orientation....the teeth should follow one another as you go from small cog to large. The setup in the last pic has them zig zagging....

From high gear they go left, right, left, left, right....
Kimmo
06-22-12, 05:33 AM
As far as orientation....the teeth should follow one another as you go from small cog to large. The setup in the last pic has them zig zagging....

I really, really doubt it matters a damn, since the teeth only line up in one spot anyway. Without shift gates, the only reason to have them all lining up in one spot is aesthetics.