So I've searched and played around but still no luck in eliminating a rollercoaster-like clicking noise from my rear cog. Searching the forums I cant get an answer on why there would be a noise with a rather ideal chainline. Here's the deal- chainline is dead-on in my measurements (yes, with a ruler not my eyeballs), chain is tight but no tighter than 1/2-1/4" deflection, rear cog is new, chainring and chain are older. I have also tried with an older cog, worn with the older chainring and chain, to see if it makes a difference - no such luck. All else - pedals, chainring bolts, are well torqued and straight.

Is it just a given that there will be noise? It is metal on metal regardless of chainline, so there HAS to be noise right? Does white lightening suck? Will some Phil oil make the difference? Or does this call for a late-night feast and sacrafice to appease the rear cog gods?

cheers and thanks

c

Lube the chain?

How hard is it to deflect the chain that much. It still could be that your chain is to tight.

i think i may have had the same problem, the solution was to lube it like mad. maybe try a different lube than the one you're using.

The only thing I didn't see mentioned in your post was if your gear is 1/8 or 3/32. Is it all the same or are there mis-matched sized parts. I had problems with a 3/32 cog and a 1/8 chain, not noise but jumping off.

I have the same issue--i've had different lbs guys (1 from a shop that carries of lot of track bikes) that you can never completely get rid of that sound. Just make sure its lubed. Once you get it out on the road you can barely notice the clakety clakety sound

I don't buy the notion that a proper chainline gives you a "completely silent" drivetrain

Miche cog and adapter often makes the noise you describe. If you are using a miche cog use some sort of second glue between adaptor an cog.

maybe it's a freewheel.

Thanks for the feedback. I think lots o'lube is the way to solve it, and will try later.

All parts are 3/32" - IRO Hub with Dura-Ace 15T cog and lock ring, 49T Sugino Chainring. I agree though, that the sound can never be silent - it just cant be possible, unless you are riding in a vat of oil.

Regarding the deflection, it is a gentle push and pull, nothing too harsh, to get a 1/2".

more news from the homefront when the lube gets on.

i have this problem too. when i'm riding i don't hear it at all but if i just lift up my back wheel and give it a soft kick of the cranks you hear this weird clicky/poppy noise. i can't figure out what the deal is. i don't care too much though because the bike rides absolutely fine but the noise is sometimes annoying.