TerraFlo learns this machine
H3, H3 Plus, and M2 pair over Bluetooth FTMS and ANT+ FE-C. Mag does not.
Equipment
Ride TerraFlo routes on a Saris trainer
H3 and M2 use Bluetooth FTMS. Mag is a manual trainer with five resistance levels.
Where this family stands
Saris H3 / H3 Plus and M2 use Bluetooth FTMS and ANT+ FE-C. A third-party app can read speed and power and drive resistance without a Saris-only session. The Saris app is for firmware.
H3 Plus is the direct-drive smart trainer: ±2%, 20% grade, 2000 W (machine spec). M2 is the wheel-on smart trainer: ±5%, 15% grade, 1500 W.
Mag is not a smart trainer. It has five manual magnetic levels. Apps only see it with an external speed sensor, and the rider sets resistance. TerraFlo does not drive Mag.
| Brand | Model/family | Protocol/status | Telemetry | Control | Simulation | Limitations | Updated |
|---|---|---|---|---|---|---|---|
| Saris | H3 / H3 Plus | Bluetooth FTMS + ANT+ FE-C | Power, speed, cadence | App control | 20% / 2000 W (machine spec) | ±2%. Direct drive. | 2026-08-30 |
| Saris | M2 | Bluetooth FTMS + ANT+ FE-C | Cadence, speed, power | Electromagnetic control | 15% / 1500 W | ±5%. Wheel-on. | 2026-08-30 |
| Saris | Mag | Not a smart trainer | External speed sensor only | Manual, five levels | None | TerraFlo does not drive Mag resistance. | 2026-08-30 |
What happens when you pair
When you pair over Bluetooth, TerraFlo discovers which telemetry the machine sends, which controls it accepts, and where its limits are. It keeps learning that setup over time.
If your Saris model does not respond over Bluetooth, send the exact model name from the Beta page.
Grade-shaped resistance
Route grade can shape resistance on H3 and M2. TerraFlo does not drive Mag.
Your data stays yours
Completed sessions are private by default and can export to Strava, Apple Health, Health Connect, or TCX where supported.