Effects of changing tire size
How Motorcycle Tire Size Affects Trail and Steering Geometry
How motorcycle tire size affects trail, rake and steering. Covers sidewall markings, calculating diameter and rolling radius, worked front and rear examples, and why calculated geometry is not proof of fitment.
How Tire Width Affects Rolling Resistance: From Sidewall Numbers to Energy Use
How tire width affects rolling resistance: reading sidewall sizes, calculating diameter and circumference, contact patch shape, inflation pressure and their limits.
How Low Tire Pressure Affects Hydroplaning: From Sidewall Numbers to the Contact Patch
How underinflation lowers the speed at which tires hydroplane, which sidewall markings matter, and how tire size math relates to wet-road grip.