Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

Like I said, they do the job, same as the S-Works rings I have on the Tarmac. My shifting issues aren't likely to have anything to do with the chainrings, just wear and tear on the 105 deraillers most likely. Cable runs could be a bit sticky too.