The new system takes max aerobic power into account as well as FTP - so Michael's big sprint power will be taken into account. His 15 second and 1 minute power are both a fair bit higher than yours. This is what Zwift say about how they are (currently) working it out - note they acknowledge that short max power effots will affect your cat (not currently the case at all):Seems weird that my watts and w/kg is higher than yours but I’m still in B and you’re in A. Maybe I misunderstood the criteria? Not that I’m complaining, let’s us know how you get on won’t you! 😄
We take into consideration the estimated VO2max (in ml/min/kg) and MAP (maximal aerobic power, i.e: the VO2max equivalent in absolute power), which can make riders fall into certain categories regardless of their FTP.
For example, imagine someone with a low-ish FTP but with a high VO2max (or MAP power) that could really do very well in certain races that require those sort of short maximal efforts. They would be put into the category above based on those values and not only based off FTP.
For a concrete example with some numbers: anyone with a VO2max equal or above 60 or a MAP value equal or above 360w or 5.4 W/kg will be put into the A category, etc.