Safety shieldAlso called a safety liner. A safety feature often referred to as a "tire within a tire.
ScuffsSlang term for tires that have been used at least once and saved for further racing. A lap or two is enough to "scuff" them in.
SetupThis referes to various adjustments that are made to the race car's suspension for handling at a specific racetrack.
Short TrackNASCAR racetracks that are less than one mile long.
Silly SeasonSlang for the period that begins during the latter part of the current season, wherein some teams announce driver, crew and/or sponsor changes.
SlickA track condition where, for a number of reasons, it's hard for a car's tires to adhere to the surface or get a good "bite.
SlingshotA maneuver in which a car following the leader in a draft suddenly steers around it, breaking the vacuum; this provides an extra burst of speed that…
Splash 'n' GoA quick pit stop that involves nothing more than refueling the race car with the amount of fuel necessary to finish the race,
SpoilerA metal blade attached to the rear deck lid of the car. It helps restrict airflow over the rear of the car, providing downforce and traction.
SponsorAn individual or business establishment that financially supports a race driver, team, race or series of races in return for advertising and marketing…
StaggerThe difference in size between the tires on the left and right side of a car. Because of a tire's makeup, slight variations in circumference result.
StickersSlang term for new tires. The name is derived from the manufacturer's stickers that are affixed to each new tire's contact surface.
Stop 'n' GoA penalty, usually assessed for speeding on pit road at the appropriate speed and stopped for one full second in the team's pit stall before returning to…
SuperspeedwayA NASCAR racetrack that is more than 2 miles long.
Sway bara bar that is used to counteract any rolling force the NASCAR race car encounters during turns.