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PostPosted: Mon Dec 02, 2013 2:59 am 
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Joined: Fri Oct 28, 2011 3:25 am
Posts: 850
Location: United Kingdom of Great Britain and Northern Ireland
Is this analysis of mine correct?

Original Campagnolo 10 speed cassette sprockets were not positioned evenly. Sprocket pitch varied, and this was because original 10 speed Ergolevers pulled differing amounts of cable depending upon which shift you were doing on the ratchet ring. On the other hand, the sprockets on newer 10 speed cassettes are spaced evenly, and no matter what shift you do with the Ergolever it moves the RD the same amount each time.

My point being .... newer, evenly spaced cassettes will not work properly with original 10 speed Ergolevers.


Thanks.


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PostPosted: Mon Dec 02, 2013 3:04 am 
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Nonsense.

Putting it another way - just wrong.

Where does this crap, sorry - mistaken idea, come from?

It's been the same for the last 13 years - ever since 10-speed was born.

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Posted: Mon Dec 02, 2013 3:04 am 


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PostPosted: Mon Dec 02, 2013 9:45 am 
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Agreed, this is all incorrect.

I actually had a Miche cassette that was evenly spaced and "campag compatible". It shifted like rubbish and was impossible to set up. This was using the last Athena 10sp.

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PostPosted: Mon Dec 02, 2013 12:34 pm 
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So, just to repeat. Campy's 10-speed sprocket spacing is the same today as it was in 2001.

Because of the different number of paired sprockets used on the various levels, different spacer thicknesses are used, in order to maintain an even sprocket spacing. Because with paired sprockets the spiders can be a little recessed.

Spacers are 2.4mm between flat sprockets excepting the 6-7 sprockets which have a 2.55mm spacer. Again, this is a long-standing practice.

On all loose cog cassettes, the first spacer by the large sprocket is thinner because the sprocket is dished towards the wheel. Final spacing is the same.

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


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PostPosted: Mon Dec 02, 2013 2:24 pm 
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Joined: Mon May 26, 2008 12:21 pm
Posts: 89
Location: UK
All Campag 10 cassettes are differentially spaced - true.
Has the spacing changed since 2001? - No, they have remained consistent.
Are they all the same - no.

The spacing between the 11 and the 12 on an 11-up is slightly different to the spacing between the 12 & the 13 on a 12-up, which varies very slightly again when compared to the 13 and the 14 on a 13-up.

Since each sprocket in these cases carries it's own spacer, in practical terms these differences are not important.

On 11s cassettes the differential spacing extends over the top 3 sprockets - so the 11-12-13 spacing is different to the 12-13-14 and the 13-14-15.

The reason for differential spacing at all - the precise reverse of what the OP states - cable recovery on click "1" of an ergo lever is slightly greater than on clicks 2-9, but clicks 2-9 are consistent in the amount of cable they recover. The problem is that the angular movement in the chain at the middle of the cassette required to make the shift is less than that at the extremes - so alongside the geometry of the RD, the spacing of the sprockets works to allow a unitary recovery of cable to give a clean shift on each sprocket.

Shimano and SRAM do it a different way.

In 9s it's not such a big issue and in 8s, not an issue worth worrying about at all.

HTH
Graeme
Velotech Cycling Ltd
Campagnolo Main UK Service Centre

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PostPosted: Mon Dec 02, 2013 2:44 pm 
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Graeme obviously has more detailed knowledge than I do. Mine is just based on years of using and playing with a variety of 10-speed cassettes. Plus regular visits to Campy's site.

As for OP's main question, I'm glad to see we are in agreement on this.

Quote:
Has the spacing changed since 2001? - No, they have remained consistent.

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


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PostPosted: Mon Dec 02, 2013 9:53 pm 
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Joined: Fri Oct 28, 2011 3:25 am
Posts: 850
Location: United Kingdom of Great Britain and Northern Ireland
I just couldn't get an aftermarket cassette (Interlock Racing Design) to work with my original 10 speed kit from year 2000. Still trying to work out why it performed so badly. I've now sold it.


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Posted: Mon Dec 02, 2013 9:53 pm 


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