BMW M2 CS RACING 2020 Driver Manual page 86

6.5. SETUP.
6.5.4. TYRES.
Tyre Temperatures:
All racing and high performance road car tyres are designed to operate within an optimum temperature range when driving near or at the
limits of a race car.
▪ Tyre temperature is too low, the coefficient of friction will be to low and maximum traction will not be achieved.
▪ Tyre tread is too hot, again traction will be lost and the tire will wear more quickly.
The optimum tyre temperature range for the specific car should be requested from the tyre supplier. The tyre temperature should be
measured by a tyre pyrometer with a needle probe and checked as close as possible to the tyre steel construction. Measuring the
temperature with a needle probe will be much more accurate, as the surface might cool down when entering into the pit lane at lower
speeds.
Measuring Temperatures:
The tyre temperature range will be measured at the outside, middle and inside area of the tire patch:
The difference between the spots should be ~10°C. (e.g. 60°C / 70°C / 80°C)
BMW M2 CS RACING 2020 I DRIVER MANUAL I BMW M MOTORSPORT I V02 I AUGUST 2023 Page 86