ERG Mode
Control your trainer at a fixed power target with fine-grained adjustments and zone presets.
ERG mode is the default when you open the app. Your trainer holds a constant power target — regardless of your cadence, the resistance adjusts to maintain the set wattage.
What You See
- Zone pill at the top — shows your current training zone (e.g., “Z2 - ENDURANCE”), color-coded
- Power arc — a circular gauge with two arcs:
- Outer arc (thick) — your target power, colored by zone
- Inner arc (thin, blue) — your actual power output
- Center number — current actual watts, with target shown below
- Data screens — swipeable metric pages showing your ride stats
- Start/Stop button at the bottom
Adjusting Power
With Zwift Ride Controller
Use the shift levers and hood buttons:
| Button | Action | Default |
|---|---|---|
| Right Shift Up | Increase by small step | +5W |
| Right Shift Down | Increase by large step | +25W |
| Right Hood | Increase by hood step | +50W |
| Left Shift Up | Decrease by small step | -5W |
| Left Shift Down | Decrease by large step | -25W |
| Left Hood | Decrease by hood step | -50W |
Quick presets via the letter buttons:
| Button | Preset | At 200W FTP |
|---|---|---|
| A | Recovery | 100W |
| Z | Endurance (70% FTP) | 140W |
| Y | Sweet Spot (88% FTP) | 176W |
| B | FTP (100%) | 200W |
Step sizes and FTP are all configurable in Settings.
Without Zwift Ride Controller
When no controller is connected, on-screen buttons appear below the power arc:
- -10W and -1W on the left
- +1W and +10W on the right
Tap to adjust your target power.
Power Zones
Your power zone is displayed at all times and affects the background glow color:
| Zone | Name | % of FTP |
|---|---|---|
| Z1 | Recovery | 0–55% |
| Z2 | Endurance | 56–75% |
| Z3 | Tempo | 76–90% |
| Z4 | Threshold | 91–105% |
| Z5 | VO2MAX | 106–120% |
| Z6 | Anaerobic | 121–150% |
| Z7 | Neuromuscular | >150% |
Zone boundaries adjust automatically based on your FTP setting. Use D-pad UP/DOWN on the Zwift Ride to jump between zones.