Originally Posted by operator
iBike, worthless
polar < powertap < srm in terms of accuracy
No idea about the ergomo.
Sigh.
Actually, in terms of accuracy it's:
Powertap= 1.5%
Ergomo=2.0%
SRM=2.5% for Pro and 5% for Amateur.
So, to answer the question, it appears that the Powertap is the best PM for the money.