Not showing accurate speed/kms?

Just a quick question - on my evening ride today, I was putting in more effort than usual but my Zwift just wasn’t picking up the accurate speed in my opinion. I compared my average Watts to other rides and the total kms weren’t nearly as high as on other rides where my average Watt was a lot lower. Has anyone else experienced this today?


Different courses have more climbing which leads to less kms. There will also be differing circumstances such as more or less people riding on your current route leading to more or less draft leading to a difference.

Read the notes on the Oct 1st Update:

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Yes I am aware of that but I’ve compared several rides on the exact same course (jungle circuit). Why would I put out more watts but get less kms? It can’t be all drafting?

Interesting… thanks!