Tyre pressures at Pembrey Circuit
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 Pembrey Circuit 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.
| CORNER | RUNS HOTTER BY, °C |
|---|---|
| Left front | +2.0 |
| Right front | +1.5 |
| Left rear | +3.0 |
| Right rear | +2.5 |
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.
Pembrey Circuit, on paper
| Location | Carmarthenshire, United Kingdom | OSM |
| Lap as mapped | 1.107 km | MEASURED |
| Longest straight | ≈159 m | DERIVED |
OSM — the sections mappers have named on this venue's tarmac: Rallycross · Honda · Dibeni · Hatchets Hairpin · Cowles Straight · Woodlands · Speedway Straight · Brooklands Hairpin · Senna Esses
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 Pembrey Circuit asks of a tyre
Pembrey is Welsh club racing's home: a compact former airfield circuit with a proper mix of quick sections and tight corners, and a surface with real bite. The hairpin and the complex ask for braking stability and traction; the faster sweeps keep the tread working between them.
Traction zones work the rears; check rear inner zones for camber-related heat
The abrasive patches reward slightly conservative pressures
Compact lap keeps everything warm once it gets there
A 992 GT3 on Cup 2 R at Pembrey Circuit
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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