Tyre pressures at Sebring International

The lap, to scale. Track outline © OpenStreetMap contributors (ODbL).

How hard a circuit works each corner of the car shows up as tread temperature, and temperature is what sets pressure. GripCalc carries corner heating figures for Sebring International as a starting point: how much hotter each tyre runs over the session's base temperature, from the layout's mix of corners and load. They pre-fill the calculator when you pick the circuit, and your own pyrometer readings refine them from the first session.

ESTIMATED — class-based starting values over an 85°C session base, derived from this layout's type (direction, speed profile, load), and shared with circuits of similar character rather than measured here. Not gospel: enter your own pyrometer figures after a session and they take precedence.

Sebring International, on paper

OSM — the sections mappers have named on this venue's tarmac: Sunset Bend · Ullman Straight · Le Mans Curve · Gendebien Bend · Bishop Bend · Tower Turn · Cunningham Corner · Collier Curve · Hairpin · Fangio · Gurney Bend

Lengths are measured from the OpenStreetMap geometry drawn above; the longest straight is derived from the same line and is approximate. Section names are the venue's, and can belong to any of its layouts.

What Sebring International asks of a tyre

Sebring International measures 5.96 km on the map, with 18 corners counted along that line. A corner every 331 m gives the tyre a steady rhythm of work, enough to build temperature without running away with it. Its longest straight runs about 913 m, far enough to cool the tread before the stop at the end of it, so a hot pressure taken in the pit lane understates what the tyre saw mid-lap.

DERIVED — length, corner count, hands and straight measured from the mapped lap drawn above. Corner counting is a judgement (a double apex can be read as one corner or two), so treat these as this line's reading of the circuit, not a series' official figures.

Sebring is the roughest famous surface in this database: much of the lap runs on original airfield concrete whose bumps and seams hammer the car and cycle tyre loads constantly. It is a test of compliance as much as grip, and pressures that are too high skip and scrub across the concrete instead of gripping it.

A 992 GT3 on Cup 2 R at Sebring International

Published hot target 30.5 / 32.0 psi at 92°C tread, on a 15°C morning, with the corner figures above: cold set 21.5 / 21.5 front, 22.6 / 22.6 rear. A different car, tyre or morning moves every number, which is what the calculator is for.

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