The grooves in your tyres are only there to displace water. It’s the rubber touching the road that counts. That being said the compound is key. Racing slicks are extremely sticky and once warmed up they try to preserve that heat either by wrapping the tyres up in thermal blankets while off the track or when on the track they try to keep momentum going to keep the tyres warm.
Cold tyres don’t grip well. This is why drivers can sometime struggle to get up to speed after a sudden slow down until they get the heat back in.
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