wedge
Refers to the relationship from corner-to-corner of the weight of the race vehicle. Increasing the weight on any corner of the vehicle affects the weight of the other three corners in direct proportion. Weight adjustments are made by turning weight jacking screws mounted on each corner with a ratchet. A typical adjustment for a loose car would be to increase the weight of the left rear corner of the vehicle, which decreases the weight of the left front and right rear corners and increases the weight of the right front. A typical adjustment for a tight vehicle would be to increase the weight of the right rear corner, which decreases the weight of the right front and left rear and increases the weight of the left front.

wheel tethers
Very strong braided kevlar and steel cables that secure wheels to the chassis in the event of a crash, reducing the likelyhood that they will completely detach from the car and possibly become a dangerous projectile.

wheelbase
The distance between a car’s front and rear axles.