Pixel Watts with Tacx trainers
Tacx smart trainers (NEO, Flux, Flow Smart …) are verified end to end with Pixel Watts. Not “should work”, but actually ridden: pairing, ERG, simulation, whole sessions.
- FTMS over Bluetooth: power, cadence, resistance.
- ERG workouts and the FTP test run with automatic resistance control.
- Older models work too, as long as they offer FTMS over Bluetooth.
Riding in three minutes
- Close the Tacx Training app (and every other trainer app). The trainer accepts only one controlling connection.
- Open app.pixelwatts.com in Chrome or Edge (or the Mac/iPad app) and go to “Pair”.
- Pedal briefly so the trainer transmits, then choose “Smart Trainer”. It appears under its Tacx name.
- Optionally add heart rate and cadence sensors, Bluetooth as well.
- Ride. The demo stage needs no account.
Common Tacx questions
Which Tacx models work?
NEO and Flux machines are verified ridden; in general every model that speaks FTMS over Bluetooth works, which all Tacx smart trainers of recent years do, the Flow Smart included.
My trainer does not show up in the list. Why?
Almost always: another app (Tacx Training, Zwift) is holding the connection, or the trainer is asleep. Close apps, pedal once, search again. And Web Bluetooth works in Chrome/Edge, not Safari. On an iPad use the iPad app.
Does Pixel Watts simulate gradients on the NEO?
Yes. In simulation mode the app sets resistance from real physics: gradient, weight, air resistance. You can recompute the numbers on the public proof bench.
Do I need ANT+?
No. Pixel Watts runs entirely over Bluetooth (FTMS); the ANT+ dongle stays in the drawer.