5 July 20251:06694 views on YouTubeWatch on YouTube
Ask a rider how fast an eFoil goes and you usually get a shrug and a rounded number. Watches record a session average and a session maximum, which tells you nothing about the moment in the footage you are actually curious about. This short episode is a first look at fixing that.
Speed on screen, in the moment
What you see here is a carve across the lake with the speed reading updating live alongside it. Because the number is tied to the ride data rather than added afterwards by eye, it moves when the ride moves: winding on through a straight, bleeding off through a turn, spiking on the run that felt fastest. Start, stop and maximum speed indicators mark the shape of the run so a viewer can see where the session peaked instead of taking a rider’s word for it.
Built from GPX rather than bought
The overlay is assembled from GPX ride data, After Effects and a custom script written for the job. That matters if you make your own eFoil videos, because it means the numbers come from a file your existing devices already produce, not from a subscription tool. Full ride breakdowns with the GPS speed synchronised to the footage are the stated goal, along with releasing the tool so other riders can overlay their own session stats and post them.
Why the number is worth showing
Speed claims in this sport are mostly unverifiable, which is why they get argued about endlessly. Putting the reading on the footage turns a claim into something a viewer can watch happen. This clip is a preview rather than the finished thing, so treat it as a look at where the ride telemetry work is heading.
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