What is it?
This simple tool allows you to adjust all tyre pressures in a setup by a positive or negative increment (outside of the game). This can be handy if you want to adjust all pressures (starting pressures and in each of your pitstop strategies) up or down to suit different air...
For those wondering about which cars are on what physics, which have traction control, ABS or adjustable tyre pressures or even which cars are regarded as being in the same class, may I humbly suggest this thread...