how the heck did you arrive at 1.38%?Netserk said:I'm calling BS on that statement. When calculating Froome's W/kg on Ventoux the difference between Froome weighting 65 and 70 kg is 1.38%.
So since those who have calculated it have used 67kg, they have less than 1% uncertainty in W/kg because of the weight.
Now would you be so kind and explain where you pulled the numbers 5-10% from?
At ANY power output the difference in w/kg from 65 to 70kg is 7.1% or the other way around (ie: from 70 to 65kg) is 7.7%.
It's about 1.5% per kg. Remember that TWO riders are being compared to each other, so if you were only 2kgs out for both riders that would be a 6% error on its own, and you haven't even begun to include all the uncertainties due to wind, drafting etc etc.
Again, I'm not saying that estimating power is a totally worthless exercise. It's good for a ballpark figure, that is all. I'm not saying that Froome is clean and I get it that many people want it to be proven, but ffs don't pretend this quackery is the way to do it.