Editing Tyres and degradation models (section)

== Circuit energy characterisation and degradation rates ==

Use a lateral/longitudinal energy index and texture/abrasion rating to forecast wear and window risk. Pirelli’s track severity scale (1–5) maps well to model priors:

{| class="wikitable"
! Circuit !! Track energy (1–5) !! Dominant load !! Surface & notes !! Expected stint shape (S/M/H)
|-
| Monaco || 1 || Low lateral; traction-limited || Smooth street; low energy || Very shallow degradation; thermal management critical at low speeds
|-
| Monza || 2 || Braking/traction; low lateral || Smooth; long straights || Low deg; front-tyre warm-up critical; flat-spot risk
|-
| Bahrain || 3–4 || Traction + braking; heat || Abrasive; hot ambient || Medium–high deg; rear thermal fade risk
|-
| Barcelona (Catalunya) || 4 || Sustained lateral || Medium-abrasive; long corners || Medium–high deg; front-left graining if cool
|-
| Silverstone || 5 || Very high lateral || Fast, high-energy || High deg; carcass temperature control is limiting
|-
| Suzuka || 5 || Mixed; long-radius lateral || Smooth-medium; esse complex || High deg; front-limited early, rear-limited late
|-
| Zandvoort || 4 || Banked lateral loading || Fresh abrasive after resurfacing || Medium–high deg; camber window tight
|}

Example calibrated degradation slopes (race runs, dry; representative order-of-magnitude for modelling, per compound on “medium” energy tracks):
{| class="wikitable"
! Compound !! Linear deg <math>d</math> (s/lap) !! Nonlinear term at end-of-stint (extra s over last 5 laps)
|-
| C1 || 0.010–0.020 || 0.2–0.6
|-
| C2 || 0.015–0.030 || 0.3–0.8
|-
| C3 || 0.020–0.040 || 0.5–1.2
|-
| C4 || 0.030–0.060 || 0.8–1.8
|-
| C5 || 0.040–0.080 || 1.0–2.5
|}