Tire stagger calculator
Stagger is the size difference between the right and left tire on the same axle. Rear stagger is the RR circumference minus the LR circumference. Measure around each tire with a tape, at the same pressure, and enter the numbers in inches.
How to use it
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Why stagger matters
On an oval the right side tires run a longer path than the left side tires each lap. A bigger right tire helps the car turn left. How much you need depends on the track, the car and the tires your class runs.
Pressure and heat change stagger
Tire size grows with air pressure and heat. Measure all four tires at the pressure you will race, at the same temperature, and write down the pressure with the size.
Common questions
Should I measure circumference or diameter?
Most oval racers measure circumference with a tape, because it is easier to measure the same way each time. The calculator takes either and turns diameter into circumference.
How does diameter relate to stagger?
Circumference is diameter times pi. One inch of diameter difference is about 3.14 inches of stagger.
What does negative stagger mean?
The left tire is bigger than the right on that axle.
Do I need front stagger?
Leave the front boxes empty if you only track rear stagger. Fill them in and the calculator shows front stagger too.
How often should I measure?
Measure whenever you mount, change or sipe tires, and before each race night. Tires can change size as they wear.
Keep your tire sizes with the setup
RaceNight setup sheets log chassis specs, scales and tire temps, and they work with no cell service. 14-day free trial.