I've found 8 minute turbo tests, a Box Hill climb and a 3 minute aerobic test (per Wattbike) gave me virtually same estimated FTP as I actually subsequently hit in a 60min cat 4 race.
YMMV
edit as hippy says, on the flat w/kg means diddly and short fatty fat fats with little legs who can get in a tuck can hurt people's feelings. :)
I've found 8 minute turbo tests, a Box Hill climb and a 3 minute aerobic test (per Wattbike) gave me virtually same estimated FTP as I actually subsequently hit in a 60min cat 4 race.
YMMV
edit as hippy says, on the flat w/kg means diddly and short fatty fat fats with little legs who can get in a tuck can hurt people's feelings. :)