This may be a bit of a silly question and I'm not too sure if I've posted it in the right place, But I'm a bit confused and need something cleared up. In physics/maths classes I've always read/been told that friction is not a function of contact area and only that of force. Now I'm going to go ahead and make an assumption and say more friction between tyre and road = more grip when accelerating or cornering. Surely this makes sense as there will be less loss of traction if there is more friction. I love my exotic/performance cars and one thing you'll notice is that they all have very very wide tyres. The New Bugatti Veyron (makes 1000hp, does 0-100km/h in 2.5s, top speed, 407kmh+ etc etc) Has something like 345mm width tyres. The Enzo Ferrari, Porsche Carrera GT have like 335mm or something. Compare this to the average sedan which has 245mm, or small cars which have around 220. Now I guess the ultimate question is why do the performance cars have wider tyres if in fact, they do not provide extra grip? Say if I were to slap on a set of 245mm performance tyres on the Veyron of Enzo, surely I wouldn't expect it to accelerate or corner as fast. Does the extra grip perhaps provide greater stability or heat distribution? Thanks.