Enter the Braking Rate, which is a number (related to G force) that indicates the ability of the vehicle to brake. The number depends upon the road surface, the weather, the tire width, compound and pressure, the braking system, the chassis, and many other factors.
Use this guide:
Racing formula car 1.0 - 2.0
Racing sports car 1.0 - 1.5
Modern sports car 0.9 - 1.0
Average car 0.8 - 0.9
Average car on wet pavement 0.5 - 0.7
On snow, with snow tires 0.2 - 0.4
On ice, without tire chains 0.1