The F1 Glossary:
Commentator Speak Explained
What do commentators mean when they say "Undercut", "Box", or "Purple Sector"? Here is your A-Z dictionary.
A
Aerodynamics
The study of how air flows over the car. F1 cars are designed to use air to push them down onto the track (downforce).
Apex
The innermost point of a corner that the car touches to take the straightest (fastest) line.
B
Backmarker
A slower car that is being lapped by the leaders.
Black Flag
A flag shown to a driver who has been disqualified and must return to the pits immediately.
Blistering
When the inside of the tyre gets too hot and explodes outwards, creating holes in the surface.
Box
A command from the engineer telling the driver to come into the pit lane for a pit stop.
C
Chassis
The main structure of the car that the engine and suspension are attached to.
Chicane
A tight sequence of corners (usually left-right or right-left) designed to slow cars down.
Clean Air
Air that hasn't been disturbed by another car. Cars have more grip in clean air.
Constructor
The team that builds the chassis. In F1, the team is the constructor (e.g., Ferrari, McLaren).
D
Delta
The time difference between two laps or two cars.
Dirty Air
Turbulent air left behind by a car. It makes it hard for the car behind to follow closely because they lose grip. Learn more →
Downforce
The aerodynamic force that pushes the car down onto the track, giving it grip. Learn more →
DRS
Drag Reduction System. A flap on the rear wing that opens to reduce drag and increase top speed for overtaking.
E
ERS
Energy Recovery System. A hybrid system that harvests energy from braking and heat to give the car extra power.
F
Flag
Signals used by marshals to communicate with drivers (e.g., Yellow, Red, Blue, Chequered).
Flat Spot
Damage to a tyre caused by locking the brakes. The tyre is no longer perfectly round, causing vibration. Learn more →
Formation Lap
The slow lap before the race starts where cars warm up their tyres and take their grid positions.
G
G-Force
The physical force acting on the driver during acceleration, braking, and cornering. Drivers experience up to 5G or 6G.
Gap
The time distance between two cars.
Graining
When the tyre surface gets hot and peels off, creating a rough texture that reduces grip. Learn more →
Grand Slam
When a driver takes Pole, wins the race, leads every lap, and gets the Fastest Lap.
Grid
The starting formation of the cars before the race begins.
H
Halo
The titanium protection bar above the cockpit that protects the driver's head from debris.
Hard Compound
The hardest tyre available. It lasts the longest but offers the least grip.
I
Installation Lap
A lap done on arrival at a circuit to check that all systems on the car are working.
Intermediate Tyres
Green-walled tyres used for light rain or damp tracks.
Interval
The time gap between two specific cars (e.g., +0.5s).
J
Jump Start
When a driver moves before the five red lights have gone out to start the race. This results in a penalty.
K
Kerb
Raised concrete edges on the inside and outside of corners. Drivers use them to widen the track.
L
Leader
The driver currently in P1.
Lift and Coast
Lifting off the accelerator before the braking zone to save fuel and cool the brakes.
Livery
The paint scheme and sticker design of the car.
Lock-up
When a driver brakes too hard and the wheel stops rotating while the car is still moving, causing smoke.
Lollipop
The sign held in front of the car during a pit stop (now mostly replaced by traffic lights).
M
Marbles
Small pieces of rubber that fly off the tyres and accumulate off the racing line. Driving on them is slippery.
Marshal
Officials around the track who wave flags and help remove stranded cars.
Medium Compound
The yellow-walled tyre that offers a balance between speed and durability.
N
Nomex
A fire-resistant material used to make drivers' race suits and underwear.
O
Overcut
Staying out longer than a rival before pitting, hoping to drive faster in clean air and come out ahead. Learn more →
Oversteer
When the rear of the car loses grip and slides out (drifting).
P
Paddock
The area behind the pit garages where the team motorhomes and trucks are located.
Parc Fermé
Literally 'Closed Park'. A secure area where cars are checked by officials. Teams cannot touch the cars here.
Pit Lane
The lane alongside the main straight where the garages are located.
Pit Stop
Stopping in the pit lane to change tyres or repair damage. Learn more →
Pit Wall
The area where the team principal and strategists sit to monitor the race.
Podium
The raised platform where the top 3 drivers celebrate after the race.
Pole Position
The first starting spot on the grid, awarded to the fastest driver in Qualifying.
Porpoising
When the car bounces up and down at high speed due to aerodynamic stalling. Learn more →
Purple Sector
The fastest time set in a sector by any driver in the session.
Q
Qualifying
The Saturday session that determines the starting order for the race.
R
Race Control
The nerve centre where the Race Director monitors the race and issues penalties.
Racing Line
The fastest path around the track.
Red Flag
A flag that stops the session immediately due to a serious accident or bad weather.
Retirement
When a car has to stop racing due to a crash or mechanical failure (DNF).
S
Safety Car
A car that leads the pack to slow them down when there is a hazard on track. Learn more →
Scrutineering
Technical checks by the FIA to ensure cars comply with the rules.
Sector
The track is split into three sections (Sector 1, 2, and 3) to measure performance in detail.
Setup
The specific configuration of the car (wing angles, suspension stiffness) for a particular track.
Slipstream
Driving closely behind another car to benefit from reduced air resistance (drag).
Soft Compound
The red-walled tyre. It is the fastest but wears out the quickest.
Steward
Officials who adjudicate on rule breaches and hand out penalties.
Stint
The period of driving between pit stops. e.g., 'His first stint on soft tyres lasted 15 laps'.
T
Telemetry
Data sent from the car to the team in real-time (speed, throttle, brake, etc.).
Tifosi
The passionate fans of Ferrari.
Tow
Another word for Slipstream.
Track Limits
The white lines defining the edge of the track. Drivers cannot cross them with all four wheels.
U
Undercut
Pitting earlier than a rival to get fresh tyres and drive faster, hoping to be ahead when the rival pits. Learn more →
Understeer
When the front of the car loses grip and doesn't turn as much as the driver wants (the car goes straight).
V
VSC
Virtual Safety Car. A system where drivers must drive at a reduced speed but no physical Safety Car is deployed.
W
Wet Tyres
Blue-walled tyres with deep grooves for heavy rain.
Wheelbase
The distance between the front and rear axles.
Y
Yellow Flag
A flag warning drivers of danger ahead. They must slow down and cannot overtake.