When fitting a cycle computer, you have to type in the wheel circumference. This helps the computer to work out how far you have travelled. What this video. - ppt download
Generic Wheel Size Calculator to Compute Bicycle Tire Circumference for your Bike Computer - YouTube
bicycle wheel circumference | Llave inglesa - by fernandoj
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Tire Dimensions | Schwalbe Tires North America – schwalbetires.com
Tire Dimensions | Schwalbe Tires North America – schwalbetires.com
Tire Dimensions | Schwalbe Tires North America – schwalbetires.com
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West Biking Wireless Bicycle Computer Backlight Waterproof Cycling Speedometer Mechanical Magnet Speed Sensor Bike Odometer - Bicycle Computer - AliExpress