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. A driver making a pit stop must wait a turn and start in 4th gear, there is no possibility of an immediate return to the track. You may allocate 20 points to the six areas of your car - Road Holding, Brakes, Tyres, Bodywork, Consumption, and Engine. Each category must have at least one point.