Wireless Bicycle speedometer with LCD display. Monitor your bikes’ speed, distance and riding time. Ideal assistant for bicycle training. Perfect for hiking, climbing, riding, etc. Make your sports life more free and comfortable. Lightweight, durable How to measure circumference of tyres? 1. Put the bike on flat ground. 2. Adjust the tire, let the tire valve and ground is vertical and nearest. 3. Push the bike along a straight line until the tire valve and ground is vertical in the second time. 4. Measure the linear distance of wheel walking. 5. Get average value of multiple measurements with units of millimeters, it is wheel size needed.
Price : $4.99
Brand : ezyoutdoor
