Also their front chain rings very tinney after changing cluster and chain if noise is still there might have to change those too.Took mine off right away put my roto-rings on. Goodluck so nice chasing a noise. Did your shop tell you it is a noisey groupset?
Had sram red for a year now,never will have anything else. Had problem with noise too,normal for sram red. Found noise was coming from their solid cluster and Chain. Put on a dura-ace cluster and chain problem sorted.
