Guides for Echowell BRI-12W from Cycling Computer

1. Roll the wheel until the valve stem at its lowest point close to the ground, then mark this first point on the ground. (Fig. a) 2. Get on the bike and have a helper push you until the valve stem returns to its lowest point. Mark the second point on the ground. (Sitting on the bike achieves a more accurate reading since the weight of the rider slightly changes the wheel circumference). 3. Measure the distance between the marks in milimeters. Enter this value to set the wheel circumference. Option: Get a suitable circumference value from the table. (Fig. b)...