Trail Tech VOYAGER PRO User Manual

Measure Wheel Size Help
Knowing your exact wheel size it critical for the wheel sensor to calculate
correct speed and distance data. The more accurate the wheel size, the
better Voyager Pro performs.
When comparing calibration to GPS data, use a long straight section of road.
GPS has trouble with tight fast corners and small vertical movements
(causing comparison inaccuracy.)
Method 1: Ruler
Find the circumference of front wheel by measuring its diameter in
millimeters. Multiply the wheel diameter by 3.14. The result is your wheel
size.
Method 2: Rolling

Trail Tech VOYAGER PRO Specifications

General

Resolution	480 x 272 pixels
Water Resistance	IP67
Micro SD Slot	Yes
Charging	USB
Connectivity	Bluetooth, Wi-Fi
Sensors	GPS, GLONASS, Barometric Altimeter, Thermometer, Accelerometer
Mounting Options	Handlebar
Power Source	Rechargeable battery