Right as rain

Knowing what the weather will do is a big part of race preparation and strategy. Just dry is easy; temperature and track rubbering-up and knowing your compounds and degradation, all fairly predictable.

Full wet, ditto, but with the added problem of aquaplaning, when the water film between rubber and surface can actually lift the rubber from contact reducing your grip level enormously. The antidote to this are sculpted tyres with grooves to channel the water away and maintain rubber contact. These full wet tyres are the most effective solution for heavy rain. The grooves can evacuate 85 litres of water per second per tyre at 300km/h. On an average track