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

Considering P2M measures both cadence and torque, and presumably does this per second. And that both pedal speed and torque will now vary with a min-max time difference of say 0.2 seconds. I struggle to see this working out well.

Power2Max samples torque AND cadence (using accelerometers) at 50Hz (50 times per second), compared with something like an SRM or Quarq which measure torque at >50Hz, but cadence only once per revolution, so a range of ~0.5-3Hz. Means that using non circular chainrings isn't so much of an issue with P2Ms (just over 2% inflation with Osymetrics) but results in much greater inflation of power numbers (ie. >5%) with an SRM or Quarq. Everyone has to transmit at 4Hz as per the ANT+ protocol, but they're 4 identical data packets so it's effectively 1Hz that goes to the head unit, all the calculations are done in the cranks

Xav