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2.3 instead of 2.2mm Campy 11s cassette spacer?
 

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Sparky
Joined: 08 Dec 2003
Posts: 16917
Location: Portland, OR

12/23/18 1:09 AM

2.3 instead of 2.2mm Campy 11s cassette spacer?

What is the deal with this? One 2.3 with the rest spaced 2.2mm. Is .1mm going to make any difference?

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4212
Location: Nashua, NH

12/23/18 10:47 AM

Apparently, or they wouldn't bother to do it. I've noticed unequal spacing on Campy 10 cassettes, too. It probably has to do with the way they design the teeth for various cog positions.

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Sparky
Joined: 08 Dec 2003
Posts: 16917
Location: Portland, OR

12/23/18 12:32 PM

Of course, and this is the one that is cracked. ;)

Both of my Campy 11s setup I have I only have used with Shimano wheels/cassettes and shifting is perfect. This is what got me to start with Campy again when I read that was the case, and has been borne out.

Not to mention the asymmetrical shifter shape, never really liked the feel of the 9 and 10s Ergos I have had. 11s Ergos are like a glove to my big mitts, even with out the ergo/bar spacers.


So my brain can't get around .1mm [mattering] on any level.

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KerryIrons
Joined: 12 Jan 2004
Posts: 2951
Location: Midland, MI

12/23/18 2:42 PM

Thread spacing

So how much movement results from a half turn of the RD barrel adjuster? I'm guessing it is on the order of 0.1 mm (pretty fine threads). That can affect shifting, right? Just saying.

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Craig
Joined: 12 Jan 2004
Posts: 563

12/23/18 3:57 PM

That's an improvement, some 10spd cassettes had 3 different sizes of spacers...

I suspect that while the spacer dimensions change, the distance between cogs remains the same. The G sized spacer, 2.3mm, should sit between the aluminum carrier-ed cogs and the individual cogs and while Campagnolo could/should have machined the alloy carrier to be .1mm thicker, they didn't. I'm sure there's a weight/stiffness/production efficiency cost/reason for this.

You can ride it cracked. If your cassette is properly tightened down it shouldn't move. You could also wrap a small piece of stainless wire around it a couple of times after the cassette is tightened down ensuring it doesn't make a break for it mid ride. It only has to last the lifetime of the cassette, the new cassette will come with another. Or, buy a new cassette, swap in the spacer you need, be careful to not overtighten etc, and then move that spacer back to the new cassette when you wear the old one out.

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Sparky
Joined: 08 Dec 2003
Posts: 16917
Location: Portland, OR

12/23/18 4:24 PM

I was thinking of popping a high temp O-ring between the cog where the cracked spacer is before tightening to spec.

Or I just might sand a Shimano 2.4mm one I have with emery paper .1mm smaller. The only reason that spacer is keyed appears to be so it only gets put between the multi cog carrier and the first loose cog where they want the extra .1mm.

I may even try the 2.4mm spacer by itself. Lets see if my .1mm argument holds water. ;)

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dddd
Joined: 11 Jan 2004
Posts: 3245
Location: NorCal

12/27/18 11:14 PM

Yeah, .1mm is a very slight change if made to a single spacer.

Turning the barrel just a quarter-turn moves the pulley a quarter of .8mm, multiplied by the actuation ratio of the derailer (1.7 or so), so more like .3mm which is a lot more than .1mm!

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4212
Location: Nashua, NH

12/28/18 8:06 AM

Sparky...

Why are you worried about a cracked spacer? It's under compression, so it's not as if it could come out when riding.

Last edited by Brian Nystrom on 12/28/18 11:15 AM; edited 1 time in total

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Sparky
Joined: 08 Dec 2003
Posts: 16917
Location: Portland, OR

12/28/18 10:11 AM

I know that intellectually, but I also like things to spec I suppose. ;)

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4212
Location: Nashua, NH

12/28/18 11:14 AM

I say Super Glue the silly spacer and lie to yourself that it actually accomplished something. ;-)

FWIW, I can be the same way. In cases like this, I tend to "fix" it until it's really broken!

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