Originally Posted by
IronHorseRiderX
From my personal experience average gym cycle trainer data is junk.
Your MTB efforts should be closer to real (very close in fact) but looking at your strava profile it does not seems like you are anywhere close to 300W.
Well, this segment
Mountain Bike Ride Profile | First Group Ride/Road Riding Experience - Easy/Aerobic near Colorado Springs | Times and Records | Strava looks like about 6.7% average grade. Average speed 10.0 mph, on a mountain bike, assuming 70 kg and no wind, power calculator gives me about 290 W. Strava is more generous and estimates 336 W. But, of course, 290 W for 5.5 minutes is not 290 W FTP.