erioshi wrote:
carguy123 wrote:
At LeMans the wider front tires are helping increase total grip. [snip]
Exactly, wider front tires mean more total contact tire patch is available, and thus more weight and aero load can be placed at the front to increase cornering speeds and front braking loads. The rear loads are maintained, and the front end can be made to work harder.
Audi did it not to improve lap times but to spread the tyre wear so they could go 5 stints and save more time in the pits (less wheel changes). They took weight from the rear to the front to do it both physically and aero (they decreased the rear loads) - that's from a Dunlop tyre tech who was there BTW.
Wider track with narrow'er tyres is a hard one but generally yes it will work out equally in the real world (if not on paper) as most suspension geometry is bad anyway so you will end up around the same overall combined contact patch with a small increase in stability from less and slower lateral weight transfer, stiffer lighter wheels and shorter tyre wall heights (using the same aspect ratio). The car will be a little easier to drive with more feel and this is an advantage in itself for the majority of drivers even if it had ultimately less grip.
Lets not exaggerate this though, maybe a 2" to 3" track width per width reduction and only to a point (say 215 down to 205).