The trundle wheel works by having a wheel which has a circumference of exactly 1 metre, hence one revolution of the wheel equates to 1 metre of distance traveled on the ground if there is no slip.
The Trundle wheel is a measuring device, a simplified form of a surveyor's wheel. It works by having a wheel which has a circumference of exactly 1 metre, hence one revolution of the wheel equates to 1 metre of distance traveled on the ground if there is no slip.