Speedometer error from tire change

Estimates percentage speedometer error after tire circumference change.

Compares a new tire diameter with a reference diameter in absolute and percentage terms.

Calculates ride height change as half of the diameter difference between new and reference tires.

Calculates circumference from a supplied diameter.

Calculates tangential tire contact force from wheel torque and rolling radius.

Calculates tire overall diameter from width, aspect ratio, and rim diameter.