What are intermediate tyres in F1?
Grooved green-marked tyres for a damp or drying track — the crossover between slicks and full wets.
Intermediate tyres, marked with a green sidewall, are the tyre of choice for a damp track, light rain, or a circuit that is drying out. Their tread clears a moderate amount of water while still offering more grip than full wets once the worst of the rain passes. Timing the switch from wets to inters, or from inters to slicks, is one of the trickiest calls in a changeable race. Run them on a dry line and they overheat and fall apart quickly.
Related tyres terms
- Slick tyres — Smooth, treadless dry-weather tyres that maximise grip by putting as much rubber on the road as possible.
- Wet tyres — Deep-grooved blue-marked tyres for heavy rain, designed to clear standing water and resist aquaplaning.
- Tyre compounds (soft, medium, hard) — The dry tyre range from soft (fastest, wears quickest) to hard (most durable, less grip), chosen to suit the track.
- The C-range (C1–C5) — The tyre supplier's full library of dry compounds, from the hardest (C1) to the softest (C5), from which three are picked per race.
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Definition written in plain language from the current F1 sporting rules and common usage, current as of 14 August 2026. Unofficial; not affiliated with Formula 1.