Quote:
Originally Posted by burn_this_city
Racing slicks aired down operate in the same way, but I think it's to gain sidewall flex aiding in traction.
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Depends on the type of car, but this is generally correct. Another, and equally important part of it is the spring rate provided by the tire/sidewall.
The biggest difference is radial tires don't react to lower pressure in the same way a bias ply race tire does. As an example, race teams would use different tire pressures on the left and right side to manage stagger to help the car turn.