How to pair a Bluetooth smart trainer in your browser

Chrome or Edge, one click, no app and no account. Works with Wahoo, Tacx, Elite, Zwift Hub and any FTMS trainer.

Monsoon Cycles, Colorado Springs · Updated November 4, 2026

You can pair a Bluetooth smart trainer to a web page. Chrome and Edge have had Web Bluetooth for years. Gumwall Grand Prix uses it to read your power and to drive the resistance with the gradient, the same FTMS protocol every trainer app uses. There is nothing to install and no account to make. The whole thing takes about a minute the first time and ten seconds after that.

OPEN THE GAME NO SMART TRAINER?

How to pair, step by step

Open the game in Chrome or Edge. Go to monsooncycles.com/game in Google Chrome or Microsoft Edge on a laptop, desktop, Chromebook or Android phone. Those browsers have Web Bluetooth. Safari and Firefox do not, so iPhone and iPad cannot pair live sensors.
Wake the trainer. Plug the trainer in and spin the pedals once so it starts advertising over Bluetooth. Close any other trainer app, because a Bluetooth trainer talks to one app at a time.
Click PAIR SENSORS, then Smart trainer. Under the ride, click PAIR SENSORS and choose Smart trainer. The browser opens its own device picker, which is the permission step. Pick your trainer by name and click Pair.
Confirm power shows. Pedal. Within a few seconds the POWER pod shows watts and the course gradient starts changing the resistance. If it reads zero, spin the pedals again and reload the page.

That is the entire process. The browser's device picker is the only permission prompt, and it is the same one a web page would use for a heart rate strap or a keyboard.

What you are looking at

Pod	Where it comes from	What it means
POWER	Trainer, FTMS Indoor Bike Data	Your watts, straight from the trainer's strain gauge or estimate
CADENCE	Trainer or a cadence sensor	Pedal revolutions per minute
SPEED	Calculated by the game	Speed on the virtual road from your watts, the gradient and drag, not the trainer's flywheel speed
HEART RATE	A Bluetooth strap, paired separately	Beats per minute

Trainer by trainer

Wahoo KICKR, Core, Snap, Move, and the Zwift Hub. Plain FTMS. Pair and ride. Wahoo notes, Zwift Hub without Zwift, KICKR Core without a subscription.
Tacx Neo, Flux, Flow, Vortex, and Elite Direto, Suito, Zumo, Justo. FTMS from about 2016 on. Tacx and Elite notes, including the older lever models.
Saris H3, M2, JetBlack Volt, Magene, Thinkrider, Van Rysel. FTMS. Pair the same way.
Any dumb trainer. Pair a speed sensor instead and pick a curve. The virtual power setup and the published curves.

Troubleshooting in order

Another app has the trainer. Quit it. One Bluetooth connection at a time is a trainer rule, not a browser rule.
The trainer is asleep. Spin the pedals, or unplug and plug it back in.
Wrong browser. The address bar must say Chrome or Edge. Arc, Brave and Vivaldi are Chromium and usually work too; Safari and Firefox never will.
Bluetooth is off at the operating system level. Turn it on, then reload the page.
Range. Bluetooth LE likes to be within a few meters with no metal in the way. A laptop on the floor behind the flywheel is a common cause of dropouts.

Still stuck? The REPORT A BUG button at the bottom of every page goes straight to Austin, and a trainer model name helps.

Pairing questions

Which browsers can pair a Bluetooth trainer?

Google Chrome and Microsoft Edge on Windows, macOS, Linux, ChromeOS and Android. They ship Web Bluetooth. Safari, Firefox and every browser on iPhone and iPad do not, so those devices cannot pair live sensors from a web page. On iOS the free Bluefy browser adds Web Bluetooth and works.

Do I need to install anything?

No. There is no app, no driver and no account. The browser asks for permission once per device and remembers it for the tab.

Which trainers work?

Any trainer that speaks Bluetooth FTMS, which is nearly every smart trainer sold since about 2018: Wahoo KICKR and KICKR Core, Zwift Hub, Tacx Neo and Flux, Elite Direto, Suito and Justo, Saris H3, JetBlack and others. If Zwift sees it as a controllable trainer over Bluetooth, it will pair here.

The trainer does not show in the picker. Why?

Nine times in ten another app is holding the connection. Quit Zwift, the Wahoo app, the Tacx app or whatever paired last, power-cycle the trainer, and try again. On Windows, make sure Bluetooth is on in system settings. On Linux, Chrome needs the experimental Web Platform features flag turned on.

Does the gradient change the resistance?

Yes. The game writes the road grade to the trainer over the FTMS control point, so climbs get harder and descents get easier. A trainer difficulty setting in the BIKE tab scales it.

I have a dumb trainer. Can I still ride?

Yes. Pair a Bluetooth speed sensor instead of a trainer, pick your trainer's resistance curve, and the game estimates power from wheel speed. The no-smart-trainer guide covers it.

Does it work on a phone?

Android phones in Chrome, yes, including pairing. iPhones can ride demo mode with touch controls but cannot pair sensors in Safari.

Keep going: Open the game · FTMS explained · No smart trainer? Ride anyway · Indoor cycling on a Chromebook · Riding on iPhone · All setup guides

Like tools that respect you? The same shop builds custom steel frames by hand. Talk to Austin about building yours.