Players then secretly decide which tyres they will use. Separate weather rolls are made for trials and the race. Conditions are wet during trials and races. A car equipped with wet tyres adds one space to each move ending inside a corner. A car equipped with dry tyres adds three spaces to each move ending inside a corner.
Conditions are normal during trials and races.
A car equipped with either type of dry tyre follows their rules. A car equipped with wet tyres doubles tyre penalties in corners and swerving. Weather starts dry for the race but can change. When a driver rolls a 19 or 20 when in 5th or 6th gear, he rolls again on the Weather chart to see if there is any change. If the result is Rain or Sunny, the weather has changed to that for the remainder of the race.