1

Sensor Placement

Position your sensors correctly for accurate data collection

Important: Proper sensor placement is critical for accurate measurements. The sensors should be mounted on the moving parts of your suspension (fork crown and shock body).

Front Fork Sensor

Fork Sensor

Mount the sensor on the left or right fork crown.

Best Practices

  • Ensure sensor is flat
  • Secure with velcro straps or zip
  • Avoid cable routing areas

Rear Shock Sensor

Rear Shock Sensor

Attach the sensor to the shock body (the main cylinder), aligned with the shock's axis of movement.

Best Practices

  • Mount on the upper shock body
  • Keep sensor parallel to shock shaft
  • Avoid areas near the shock reservoir
  • Ensure sensor doesn't interfere with linkage
  • Test full suspension travel before riding
Warning: Make sure sensors are securely fastened and won't come loose during riding. Test your setup on easy terrain first to verify sensor placement doesn't interfere with suspension movement.
2

Sensor Connection & Calibration

Connect and calibrate sensors for accurate measurements

1

Open the Trailmetry App

Launch the app and navigate to the Ride screen. Make sure Bluetooth is enabled on your device.

Open Trailmetry App
2

Connect Your Sensors

Tap the fork and shock buttons individually to scan for nearby Witmotion sensors. Select your front fork sensor and rear shock sensor to pair them with the app.

Connect Sensors Connect Sensors

Now Let's Calibrate

With sensors connected, you'll calibrate them to establish your zero reference point

3

Open Sensor Status Screen

Tap the sensor status button at the top of the Ride screen to access calibration controls for your fork and shock sensors.

Sensor Status Screen
4

Set Bike to Static Sag Position

With your normal riding gear on, sit on the bike in your typical riding position. Keep the bike stationary and stay seated without leaning on walls or moving. This establishes your sag baseline - the natural resting position of your suspension under your weight.

SAG position
Critical: Calibration sets the zero reference point at your current sag position. All travel measurements will be relative to this position, so it's essential to be seated in your normal riding position.
5

Calibrate Each Sensor

While maintaining sag position, tap "Calibrate" for the fork sensor first, then for the shock sensor. Keep completely still during the 8-second calibration process. The app will set your current position as the zero reference point.

Sensor Status Screen
Sensor Status Screen
6

Verify Calibration

After calibration, compress the suspension to full bottom-out, then fully extend. Check the sensor readings in the app to verify they respond correctly across the entire range of motion. Values should return to near zero when you return to sag position.

When to Recalibrate: Recalibrate your sensors whenever you change suspension air pressure or spring rates, as this affects sag and shifts your zero reference point. Also recalibrate if you notice inconsistent readings or after remounting sensors.
How Calibration Works: The sensors measure acceleration along specific axes (Z-axis for fork, Y-axis for shock). Calibration tells the sensor "this current angle is zero" at your sag position. After calibration, compression shows positive values and extension shows negative values, all relative to your calibrated zero point.
3

Configure Bike Settings in App

Enter your bike specifications for accurate analysis

1

Bike Profile

Go to Dashboard > Equipment. Enter your bike's model, suspensions models and travel, pressure. This is crucial for Trailmetry calculations.

Connect Sensors
2

Suspension Specifications

Input your fork and shock travel, spring type (air/coil), and current pressure/spring rate settings. Include any volume spacers or tokens installed.

3

Damper Settings

Record your current rebound and compression damping settings (number of clicks from full open/closed). Update these whenever you adjust your suspension.

4

Rider Weight

Enter your weight with full riding gear (helmet, pack, water). This is crucial for accurate sag calculations and setup recommendations.

Accuracy Matters: Precise bike settings allow Trailmetry's AI to provide personalized recommendations. Update these settings whenever you make changes to your suspension or setup.
4

Start Your First Ride

Begin collecting suspension data on the trail

1

Pre-Ride Check

Verify sensors are securely mounted, batteries are charged (check LED indicators), and Bluetooth connection is active in the app.

2

Start Recording

Open the app and tap "Start Ride". The app will begin recording, sensor data, GPS (optional).

Sensor Status Screen
Sensor Status Screen
3

Ride Normally

Ride your usual trails and terrain. The app collects data - just focus on riding and having fun!

Fork O-ring Measurement
4

End Session

After your ride, tap "Stop Recording". The app will save your session, acceed your dashboard session for analysis.

Fork O-ring Measurement
Best Results: For optimal data quality, ride for at least 1 minutes on varied terrain. Include descents, jumps, and rough sections to get comprehensive suspension performance data.

You're All Set!

Your Trailmetry system is configured and ready to collect data. Start riding and let the app help you optimize your suspension setup!

Quick Reference Guide

Battery Life

Sensors last months per charge, and 8 hours in full usage. Charge via USB-C before long rides.

Data Sync

Syncs sessions manually after rides if you want share publicly. Requires internet connection for cloud backup.

Maintenance

Clean sensors after muddy rides. Check mounting security before each session.

Recalibration

Recalibrate after setup changes or if readings seem inconsistent.