Tak existuje aj kvalifikovaný názor, že na uhlovej rýchlosti nezáleží (a pravdu povediac, nie je mi celkom zjavné, kde je pravda - žeby konštrukčne závislé?) od inginierov zo SRM:
“We have had an increasing number of customers use Q-rings with their SRM Power Meter. There is no difference in wattage accuracy between using a regular chain ring or an elliptical chain ring. The important thing is that the SRM power meter is calibrated with a regular round chain ring to determine the slope of the power meter, which is exclusive to that power meter. Once this is determined, any type of chain ring can be used and wattage accuracy is maintained. Think of it in these terms, the elliptical chain ring only adds more leverage, which in turn can allow for more torque per
pedal revolution. This is no more different than changing the crank arm length, which has no effect on the accuracy of the power meter. Torque is torque…”
Powertap P1 to rieši zvýšenou sampling rate kde s pomocou akcelerometra sníma aj uhlovú rýchlosť (toto má dostať v nejakom fw update aj Assioma vraj).