Noted. I'll have get my hands on a new cog and try it out -- I had a Surly cog on my last FG and I don't remember it being noisy at all..
Originally Posted by
TejanoTrackie
Try a different brand rear cog. I've had problems with Surly cogs being noisy and rough in the past that was solved by changing to other brands like Soma and Shimano Dura Ace.