Average Speed Accuracy


I’m riding with a powermeter. 233w weighted gets me 19mph around the island, which I think seems very high. Generally, I would think Zwift is a couple of mph out compared to the real road. Do you make any assumptions for ‘island’ wind etc or frontal area based on weight, how is the speed calculated? btw I’m 90kg.

Hi Stephen, 

Zwift does take into consideration wind resistance, road resistance, virtual terrain like hills as well as your weight and your bikes weight when calculating speed on the Island.  

If you’re riding with a power meter it should be accurate.