DAMPER
The technically correct term for “shock absorber.” It dampens the frequency of a spring’s motion; it does not support the weight of the car.

DECREASING RADIUS CORNER
A corner where the first section of the turn has a larger radius than the second.

DEEP/GOING DEEP
Going to the brakes as close as possible to a corner.

DIVE-BOMB
An ill-advised, late attempt at a pass.

DOUBLE-CLUTCH
A downshifting technique used to manually speed up the main-shaft in a non-synchronized transmission. Does not apply to sequential gearboxes.

DRAFT
Using the slipstream to approach and pass other cars. Also known as “tow.”

DROP WHEELS
The act of driving with one or more wheels of the car off the race track.

DUMP SHIFT
Skipping gears when downshifting. Typically going directly from top gear to first rather than downshifting through each gear.