I have a new full 1/8" driveline: sugino-75 48t chainring, izumi eco chain, surly cogs (15/17t). It has a perfect chainline and the tension is even (and set correctly) through full rotation.

However it is quite noisy - especially at higher cadences on the road. Noisy enough that others I've ridden with have commented.

I am surprised, given that my previous full 3/32" set up with cheap (mildly eccentric) sugino chainring, SRAM PC-58 chain, soma cogs was much quieter on the same bike.

I've heard that 1/8" may be a bit noisier and that a new driveline may quiet down after use. Mainly I wonder if any of the above 1/8" driveline components or combination of them are known to be noisy.

Al