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

Why MTB over the road wifli ones?

What he said, plus the 36T sprocket option because why not? Compared with the old 6-speed touring blocks, which were fine, the jumps on a 12-36 10-speed are smaller on the middle 6 and you get 2 extra gears at each end