Originally Posted by
SoSmellyAir
Wheel RPM or crank RPM? If the latter, how come I still cannot buy a reasonably accurate cadence meter all these years later? No, I don't need a power meter to tell me how meager mine is.
I think it calculated cadence rpm from speed and gearing. It was an amazing device in its day. You can google it. There is a lot of info on the net about it. There have been threads on it here on BF, too.