I've got a brand new 10 speed 105 drivetrain on my bike.
Gears all shift fine.
Problem is that it's noisy.
If I put my finger on the bottom of the rear mech cage as I turn the pedals in the stand there's a distinct vibration through it - it's moving backwards and forwards ever so slightly each time a tooth on the chainring engages with a link on the chain (or a link leaves the chain, I guess). It's like the chain isn;t sitting on the teeth on the cassette or chainring quite right and is 'dropping' onto the cog when under tension.
Chain is fitted the right way round - writing facing out, slots in the plates facing towards the wheel. I've cleaned the chain so it doesn't have the new grease on it sticking it to the chainring. Chain is the correct length.
I've tried adjusting the rear mech tension and it's the same throughout the adjustment range (ie. doesn't seem to be that the mech is trying to move the chain across the cassette and it's climbing and then dropping).
Tried spinning the wheel out of the bike and it's spinning smoothly. The freehub is a clicky (like Hope) one but doesn't seem rough at all. Wheel is virtually new too.
Anyone got any ideas?