To determine tire circumference (L) with more accuracy, measure the tire using the method below.

* When using “Cateye Cycling™” smartphone app, you can simply select the size indicated on the tire.

 

Measure actual tire circumference (L)

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.