# Pacejka's Magic Formula:Nominal vertical load on tire

To work with Magic Formula for load dependent conditions, we have to use some of additional parameters. In this link, you can find the formula about this.

What is the meaning of Fz0 (Nominal vertical load on tire)? Is it static load?

Thanks a lot,

The meaning of $$F_{Z0}$$ is the vertical load on the tire. Since tire-ground interaction is friction based, greater load leads to greater friction forces (longitudinal and transverse).
Regarding, whether that is static or dynamic load: the $$F_{z0}$$ represent a dynamic load in the sense, that when taking a turn, the wheels on the outer side of the turn are loaded more than the wheels on the inside of the turn. So most of the time, when a vehicle is turnign there is continuously redistribution of the forces on the wheels.