zacster

I put together a wheel a few years ago, Easton Ascent with a Chorus (or was it Veloce/Centaur?) cassette on it that has never been quiet in a particular cog. This is the 4th largest cog on a 13-26. I was cleaning the bike today and I thought to check the chain on that cog and I noticed that there is no clearance on one side, so I checked the next two adjacent cogs and saw that each had enough clearance, and the other side of the noisy one had even more clearance. Clearly the spacing is off. Shifting in and out of it hasn't been a problem.

If I disassembled this cassette would I find any spacers there, possibly one out of place? Any Campy gearheads out there that know? It's not something I want to do on speculation, although it wouldn't be that hard and I do have the tool. And if you've looked at Campy cassette pricing you don't just toss one because its a little noisy.

It just occurred to me as I write this that I still have the cassette on my other Campy wheel that sits unused. Maybe I should look at that one and maybe measure both.

FBinNY 

If this is a Chorus cassette the larger sprockets are paired on hubs (spiders), while lower end cassettes are all loose cogs and spacers.

The paired sprockets use different spacers than the smaller loose sprockets, so it's very possible that someone assembled it out of sequence.

zacster

I actually don't remember what level cassette it is. I know when I looked to replace it I was shocked at the cost of a Chorus cassette, if you could even find one. It is probably the next level down, which I guess is what you are saying, it could be missing a spacer. I just remember taking it out of the box and mounting it. Shimano cassettes are much cheaper.

When and if my derailleur hanger ever comes I'll take the cassette off and check. In the meantime I need to just ride.

rm -rf

The 10 speed loose cog sets, like Veloce, have a different colored spacer between the 4th and 5th cog, counting down from the largest one. I think it's slightly thicker than the other spacers. It's marked "6-7" (between the 6 and 7 cogs, counting from the smallest.

13-26 Veloce 10 speed cassette, smallest to largest:
1-2 no spacer, it's built into the 1 cog.
2-3 round spacer
3-4 round spacer
4-5 round spacer
5-6 black with "ears" probably labeled 2.4
6-7 color with ears, either anodized blue or amber plastic ( googling shows it's 2.55 mm)
7-8 black ears 2.4
8-9 black ears 2.4
9-10 black ears labeled 1.6 This one is much thinner than the others.

Maybe the 9-10 is in the middle of your cassette!

zacster

Thanks. This is what I wanted to know. And its between the 4th and 5th cog that I thought the spacing was off. Maybe I'll take it off and check it out on the next rainy day.

zacster

More than a few rainy days have come and gone, but I finally took it off today. But, no dice on the spacers, they were all correct. At least I have a very clean cassette now. All that dirt you never get with a rag or a brush between the cogs is now gone. I found out that I always get the visible dirt on the front face of the cogs, but the rear face had lots of buildup. Now the only dirt left is on my hands.

So far, I've super cleaned the chain and gave a good lubrication, I've straightened my derailleur hanger with a Park DAG-2, and now I've disassembled, cleaned and reassembled the cassette. Straightening the derailleur hanger made it generally less noisy, but didn't take care of the click,click,click in the one gear. Let's see if this last thing does the trick.