Tyre Pressure

What is tyre pressure?

Tyre pressure is the air pressure inside the tyre, typically between 2.0 and 2.5 bar for road use in a sports car. On a circuit it becomes a critical performance factor: too high and the tyre goes hard and loses grip, too low and the sidewall flexes and the tyre overheats.

Hot versus cold pressure

Pressure rises with temperature. During warm-up it can climb by 0.3 to 0.5 bar. Professionals set the hot pressure and let the cold figure fall accordingly. If you want 2.5 bar hot, you might start at 2.1 bar cold. The values on the door pillar are for road use; on a circuit different rules apply.

Finding the right pressure

The ideal track pressure depends on the tyre, the car, the circuit and the ambient temperature. For a 911 on Cup 2 tyres, 2.0 to 2.2 bar cold at the front and 2.2 to 2.4 bar at the rear is typical. Getting oversteer? Raise the front and drop the rear. Getting understeer? The other way around. Pressure is the fastest setup tool you have.

Tyre pressure service at ESC

On ESC track days the crew and coaches handle pressure optimisation for you, measured hot and matched to the circuit and your driving style. Let the setup service support you.