Inaccurate speeds in Strava
Slopes sends over a lot of data to Strava, including average speed and max speed. Unfortunately, it is on them to use the data we send over, and for speeds they don't.
They currently only display speeds if they come from Strava's own calculations based on GPS data. This is causing things like average speed to look incorrect (they simply recalculate it as distance / time), and for no max speed to register.
We have raised this issue to our Strava partnership contact regarding this issue, and continue to remind them that it is causing frustration for our mutual users.