Originally Posted by
DirePenguin
I’ve estimated mine to be 225 based on hour-long high-effort rides on my CycleOps Fluid2 trainer and its published power curve.
I’ve done numerous outdoor rides where my Normalized Power (with a 4iiiii Precision 3, left-side power meter) were 215-220, so I think my estimate is good enough for calculating zones and using them for training.
One of these days, I’m going to do an actual FTP test on my trainer….
I had a CycleOps Fluid2 trainer that I used to estimate my FTP, then I bought a power meter. It wasn't even close. The cycleops was high by about 40 watts. I was doing The Sufferfest back then and when I switched to real power I could no longer do the rides based on my FTP/4DP numbers that were based on virtual power. The other thing about the Cycleops is that you can spin it out even though it is a fluid trainer. At some point it stops providing enough resistance. I eventually switched to a smart trainer and the smart trainer was almost spot on with the power meter's numbers.