Determine tire circumference
Determine tire circumference (L) by referring to the tire size chart or by measuring the actual tire circumference of your bicycle.
Tire circumference reference table
You can find the circumference on the tire size chart.
* The tire size or ETRTO code is indicated on the side of the tire.
Measure actual tire circumference
You can measure the tire circumference of your bicycle.
With tire air pressure adjusted appropriately, apply a load to the bicycle.
Using the valve, etc., as a marker, rotate the tire once and measure the distance traveled along the ground.