IndyCar Pit Stops Explained: Why Only Six Go Over the Wall
Welcome to the Happy Hour Racing IndyCar Tech Breakdown, where we take one confusing part of IndyCar and make it make sense. No engineering degree required.
The Short Version
An IndyCar pit stop looks like chaos. It is actually one of the most tightly written sections of the rulebook. Six people are allowed over the wall during a race, and the 2026 NTT INDYCAR SERIES rulebook names every one of the jobs: four tire changers, one airjack operator, one fueler. A seventh person is allowed, but only to clean the windshield. And the fuel goes in by gravity, not by a pump, which is the single biggest reason an IndyCar stop takes longer than a Formula 1 stop. Here is what all of those people are actually doing.
Six Over the Wall, and the Rulebook Names Every Job
In most sports the lineup is a team decision. In IndyCar it is a rule. Rule 7.10.5 allows the driver plus six crew members on the track side of the pit wall during a stop, and it lists them out: four tire changers, one airjack operator, one fueler. The fueler is not allowed to do anything else. Not a tire, not a wing adjustment, nothing but fuel.
Send a seventh body over and the car gets penalized. That is written as its own pit safety violation under Rule 7.11.
A few smaller rules shape what you see on TV. The crew can take their spots one lap before the car arrives, so the guys crouched in the lane with guns in hand are legal. The outside front tire changer has to keep a foot on his tire until he drops into position, because loose equipment in a live pit lane is how people get hurt. Nobody except the windshield man may stand on the pit wall. And the car has to be parked straight, with the outer point of the inside rear tire no more than 48 inches from the face of the wall.
Behind the wall there is a second group handing fresh tires forward and dragging the used ones back. They do not count against the six.
The Fuel Is the Clock
Here is the part that explains the whole stop. IndyCar still refuels during a race. Formula 1 stopped in 2010. NASCAR pours from a can. IndyCar feeds a hose with gravity.
The rules are blunt about it. During a race, fuel flow must be gravity flow only, and the vent hose cannot have anything attached to help pull air out. No pumps. No pressure. No vacuum. The fuel sits in a 152-gallon stainless steel tank on a stand behind the wall. That tank can stand up to 84 inches tall, and its vent pipe has to reach at least 102 inches. All that height is the engine of the whole system. Gravity does the work.
The car's tank holds a maximum of 18.5 gallons. The hose has to come from one approved supplier, has to be at least 10 feet long, and its inside diameter cannot be more than 3 inches. The coupling is a dry-break unit from Red Head Valves, which is why the fueler can jam a probe into the side of the car and yank it back out with almost nothing spilled.
That is also why the fueler is dressed differently than everyone else. The rulebook requires him to wear a full-face helmet with a fire-retardant Nomex lining and to keep the visor down the entire time fuel is moving. Every team also has to keep four charged 2.5-gallon water extinguishers at the corners of the fuel stand, plus two five-gallon open containers of water.
The Seventh Crew Member Only Touches the Windshield
IndyCar added the aeroscreen in 2020 and picked up a new problem with it. The screen collects rubber and bugs, and a driver cannot see through it forever. So the rulebook carved out one extra person.
It is the most specific job description in the book. The aeroscreen attendant can work without gloves. He has to stay sitting, standing or behind the wall until the car has come to a complete stop in its box. He can only work while the rear tires are in the air. He can hand the driver a drink bottle, reattach the driver's helmet cooling tube, and clean the screen or pull a tear-off. He has to stay in control of every tear-off he pulls. Then he goes straight back to the cold side of the wall.
That is the entire list. He cannot touch a tire. He cannot touch a wing.
IndyCar Pit Lane Speed Changes at Every Track
Most series publish one pit road speed. IndyCar publishes a table, and the 2026 version runs from 40 mph to 60 mph depending on the venue.
Forty mph at Detroit, Arlington and Markham, where the lanes are tight street-course lanes. Forty-five at most of the road courses, including Barber, Mid-Ohio, Portland, Laguna Seca and the IMS road course. Sixty at Phoenix, at Nashville and for the Indianapolis 500.
A handful of tracks also get a second stage, which is a separate limit for the entry or exit lane so drivers are not braking from racing speed straight down to the pit limit. Phoenix allows 100 mph on entry. Road America allows 90. Nashville allows 90 on exit, and both World Wide Technology Raceway and Milwaukee allow 80.
Go over it and you get a black flag penalty. Race control picks which one: a drive through at pit lane speed, a stop and go in your own box, or a stop and hold for a set amount of time.
Why an IndyCar Pit Stop Happens When It Does
Fuel is one reason. Tires are the other, and in 2026 that became a rule rather than a choice. At street course events a car has to use two sets of alternate tires and one set of primary tires, and it has to run at least two laps on each of them. Three different sets in one race means a minimum of two stops, whether the strategist wants them or not. Miss it and the penalty is at least one lap.
#IndyCar will now force teams to make an extra pit stop at street courses with new tire usage requirements in 2026.
- Motorsport (@Motorsport) February 23, 2026
Series officials have also introduced a flap to help limit airborne accidents at the #Indy500 https://t.co/ekZFNDxaIS
Who Was Actually Best at It in 2026
INDYCAR keeps score on this. The Firestone Pit Stop Performance Award hands out points after every race based on the shortest average time in pit lane for cars that changed all four tires, and it mirrors the race points table, penalties included.
Scott Dixon's No. 9 Chip Ganassi Racing crew took it for 2026 with 514 points. Scott McLaughlin's No. 3 Team Penske crew finished second on 501. Josef Newgarden's No. 2 Penske crew was third on 462.
For a single-stop benchmark, the Carb Day Pit Stop Challenge at Indianapolis is the closest thing to a stopwatch the series publishes. Newgarden's No. 2 crew won the 2025 edition in 10.263 seconds. That is a head-to-head exhibition and not a race stop, but it tells you where the floor is.
The Bottom Line
Six people, one hose, and gravity. That is the whole thing. The next time a driver loses three spots on pit lane, watch the fuel probe instead of the tires. Tires come off in a couple of seconds. The fuel takes exactly as long as gravity takes, and no crew on earth can hurry that up.
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