Has anyone considered replacing individual cassette cogs. I'm hearing some chain noise coming from my Campagnolo Chorus cassette when in the no. 19 cog and not any other cogs. I recently replaced the Campy Chorus chain. I know I'm mostly in the middle cassette range when riding and found Campagnolo 17-19-21 carrier assembly for about $47 available. A Campy Chorus 11 speed 12-27 cassette goes for about $100.

I replaced my 14t cog on my SRAM Force BITD.

If you know that's what is causing it, go for it.

You still might want to consider the full cassette.. eventually other cogs on the cassette will go. I guess buying the whole cassette would put 2/3rds of the cassette on the shelf available for swapping in later? You could also save a few bucks I think and go to Potenza level. I don't know if the sectional portions of a Potenza cassette would be the same as for Chorus.

The replacement I've found doesn't indicate if it's a Chorus or Potenza model. I think referencing the Campagnolo Parts web site will show something but its hard to navigate.

You can certainly make that repair. But IMO, and really just my personal opinion, it's just less trouble to replace the entire cassette. The thing is, you have to make sure that the replacement is of the exact same model. I've ordered 'replacement' cogs that supposedly would fit. Dismantled and reassembled the cassette. But for whatever reason they weren't the precise thickness of the original cog and consequently made the rest of the smaller cogs just a bit out of place...and thereby making shifting FUBAR'd. Also, when I change out a cassette...I find that it's also time to replace the chain.

Dan

You'd want part 11S-791 which is the replacement for Chorus or Record.
Universal Cycles has this part

Thank You brother

If you regularly wear out those cogs first, the 17-19-21 carrier might be worth getting before your next full replacement. If you don't find yourself using the 27T, consider switching to a 12-25 that would give you an 18T to help spread out the wear.

But I wouldn't replace based on noise alone. Wait until it skips or shifting degrades.

Replacing individual cogs: I've been doing this for decades, with no apparent deterioration in shift quality. If you mix Hyperglide with the older Uniglide cogs, you will notice some clunkiness in the shift speed.

As to Campagnolo: check the letter coding on the 3 cogs you currently have versus what you want to order. I always wear out the 17-19-21 'A' labelled cogs on the 13-29 10-speed cassette. Like for like. Now cassette lifespan is doubled.