I got a Condor cog and that seemed much quieter than the knackered DuraAce one I had before. Probably just because it was new though.
There's should be a little play up and down with the chain, if it's crazy tight and starts clicking when at it's tightest point, that's too tight. Loosen it up ever so slightly and that'll help. Also make sure your wheel is in straight as if the cog is even at a tiny angle to the chainring, it's going to make some noise.
I got a Condor cog and that seemed much quieter than the knackered DuraAce one I had before. Probably just because it was new though.
There's should be a little play up and down with the chain, if it's crazy tight and starts clicking when at it's tightest point, that's too tight. Loosen it up ever so slightly and that'll help. Also make sure your wheel is in straight as if the cog is even at a tiny angle to the chainring, it's going to make some noise.