Tag: Wheel

3 Ways to Measure a Bicycle Wheel

About This Article

Article SummaryX

To measure a bicycle wheel, start by standing the bike upright by leaning it against a wall or using the kickstand. Then, use a tape measure to measure the distance from the ground underneath the tire to the center of the wheel to get the radius. Next, multiple the radius by 2 to get the diameter. For example, if you measure 14 inches from the ground to the center, the diameter is 28 inches. Finally, measure the flat part of the tire across the treads to find the width

Read More

The Bicycle Wheel as a Gyroscope

A rider leaning left will produce a torque which will cause the bicycle wheel to precess counterclockwise as seen from above, turning the bicycle left. The angulur momentum of the bicycle wheels is to the left. The torque produced by leaning is to the rear of the bicycle, as may be seen from the right-hand rule. This gives a rearward change in the angular momentum vector, turning the bicycle left.

This is a good visual example of the directions of the angular momenta and torques, but the gyroscopic torques of bicycle wheels are apparently quite small (see Lowell and McKell). The gyroscopically motivated descriptions like “leaning left turns it left” are more appropriate to motorcycles. With a bicycle at low speeds, the main turning influence comes from the turning of the handlebars.

In terms of the stability of the bicycle when riding, the association with leaning and turning

Read More