How-To Guide

Detail on how to determine the tire circumference
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.
When using front
wheel for speed
measurement
When using rear
wheel for speed
measurement