Originally Posted by
DaveLeeNC
Speed matters. But on any given day it may or may not be a meaningful comparison with other rides. Surfaces vary. Elevation varies. Wind varies (and this can be a huge deal even with a constant wind and a loop course). If you want to know (for sure) "what did I do today?", power always answers that question. Speed might or might not on a given day.
dave
ps. And if your focus is riding position and efficiency, a given ride (power or not) probably won't answer that one.
Some of the fastest <70 year old fastest TT riders in the world are on record going measurement free in the event. Fabian said that, Taylor Finny rides free as does Cam Wurf (2X Kona record).
Then track requires Measurment Free. Would Wiggins have been faster with a PM? Don't know - he didn't have one.
This idea is not weird to the fastest. It seems to be weird on BF however and to folks that read books about it.