Wheel base

Measurement from the center of the front wheel to the center of the rear wheel. Wheelbase is a function of motorcycle frame length, steering axis angle, and fork offset. Wheelbase has a major influence on the longitudinal stability of a bike (along with the height of the center of gravity). Short bikes are much more likely to perform [wheelies] and stoppies and have the quickest handling characteristics. On the other hand, a motorcycle’s straight-line stability improves with longer wheelbase. For example, sport bikes have a shorter wheelbase and tourers have longer wheelbases.