Originally Posted by
guachi
The flatter it is the higher my average power output will be.
Do you have a power meter on your bike? I ask because outside performance is usually riders can hold higher wattage on climbs then on the flats. Also, wattage tends to be higher outdoors than in. Zwift physics has some compromises. I climb on Zwift much better than I do in real life. It must be difficult to recreate the effects of gravity.