Stints¶
A stint is a continuous run by one driver on one set of tires. One
Stints record covers one stint: the driver, the compound, which laps
it ran from and to, and how worn the tires were when the stint began.
In a race, the first stint of each driver starts at lap 1. Every pit stop ends one stint and begins the next: a driver who pits three times has four stints. In practice and qualifying, drivers may complete many short stints over the course of the session.
Stints is what makes the Tire Strategy
timeline possible — each coloured segment in a driver's lane on that
chart is one Stints record, drawn from lap_start to lap_end and
coloured by compound.
Fields¶
| Field | Type | Meaning |
|---|---|---|
session_key |
int | The session this stint belongs to. |
meeting_key |
int | The race weekend. |
driver_number |
int | Driver this stint belongs to. |
stint_number |
int | Stint index for this driver in this session (1, 2, 3, …). |
lap_start |
int | First lap of the stint. |
lap_end |
int | Last lap of the stint. |
compound |
string | Tire compound for this stint. One of SOFT, MEDIUM, HARD, INTERMEDIATE, WET. |
tyre_age_at_start |
int | Number of laps the tires had already been used before this stint started. 0 = brand new. |
Sample record¶
{
"session_key": 7953,
"meeting_key": 1141,
"driver_number": 1,
"stint_number": 2,
"lap_start": 18,
"lap_end": 35,
"compound": "HARD",
"tyre_age_at_start": 0
}
This is Verstappen's second stint at the 2023 Bahrain Grand Prix: a brand-new set of hards, run from lap 18 to lap 35 (18 laps long).