BustaWrench › Answers › How do I read tire temperatures in iRacing?
The short answer
Your black box gives three temperatures per tyre — inside, centre, outside. Even across all three (within about 5–8°F) means the whole contact patch is working. A centre running 10°F or more hotter than the edges means too much air; edges hot with a cool centre means too little. Check every 5–7 laps, not every corner.
The modern iRacing tyres do not lie, but they do whisper. Inside, centre, outside — that is your triangle. Even across all three means the tyre is working the whole contact patch. A spike in one zone tells you where the grip is and where the wear is going.
Centre temp runs hot — 10°F or more above the edges — and the tread looks like a bald stripe down the middle: shiny, smooth, no feathering. The tyre is ballooning and rolling on a narrow crown.
Drop cold pressure by 1–1.5 PSI on that axle. You gain contact patch and stop the centre scrub.
Now the outside and inside edges run hot with a cooler centre, and the shoulders show feathering or scuffing. The tyre is rolling over its sidewalls and flexing too much.
Add 1–1.5 PSI cold. That stabilises the sidewall and puts the centre back in the game.
Inside and outside uneven while the centre is fine is not air — that is camber or track temperature. Do not chase it with pressure. Note the imbalance and adjust alignment next session.
And if all three read high but even, that is just a hot track. Nothing is broken.
Check temps every 5–7 laps, not every corner. One clean reading mid-stint beats fifty panicked ones.
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