Dannnnn wrote: ↑
Tue Feb 26, 2019 5:33 pm
guyc wrote: ↑
Tue Feb 26, 2019 5:08 pm
I see people who seem to pump out 300w average on Zwift and who then manage 145w averages on actual road rides. Puzzling.
Thing is a lot of people who are on zwift don't have a PM for outdoors (I certainly don't)
So Strava does the whole "power estimation" thing.
Mine will be similar to what you see.
On the Neo on zwift I can ride at 240w for over an hour. Outdoors Strava would estimate my power at like 140w.
No cheating, just lack of equipment....
It's more that the equipment available just isn't accurate enough. This includes all of the following:
1) Just about all ZPower estimates.
2) Just about all wheel-on smart-trainers. Think your $600 KICKR Snap is accurate? Nope. Even if you follow the directions properly before a spindown, almost all overshoot by 10-20%
3) Many direct-drive trainers have various quirks. Gen1 KICKRs typically overshoot by 10% or so. The Tacx Flux S can overshoot and undershoot depending on power ranges. My Hammer overshoots on fast accelerations, sprinter power can be 200W off...1200W appears as 1400W.
The only trainers I feel are rock solid in terms of accuracy day after day are the Tacx Neo, Elite Drivo and Elite Direto. And this is only after comparing against a known good power source first.
Anyone who owns both a smart trainer and a separate power meter...well they should record with the power meter at all times. Don't cheat yourself.