RACE RUBBERRace tires as opposed to qualifying tires.
RACER'S TAPEHeavy duty duct tape used to temporarily repair hanging body parts, which might hinder aerodynamic features and decrease performance. Most commonly used on stock cars (e.g. NASCAR Nextel Cup), which use more paneling than Champ Car World Series vehicles and are accustomed to more contact.
RAIN TIRESSofter compound with better tread for wet-weather conditions. In dry conditions, these softer tires wear faster than harder compound tires with less tread. Also referred to as "Wets."
REACTION TIMEThe time it takes an NHRA driver to react to the green starting light on the Christmas Tree, measured in thousandths of a second. The reaction-time counter begins when the last amber light flashes on the Tree and stops when the vehicle clears the stage beam.
RECONNAISANCEOften called the "Reece" - is a pre-event period during which crews drive the rally route and special stages to prepare pace notes.