Quote:
Originally Posted by ZDan
Overly large-diameter wheels/tires aren't helping the mustang, they're hurting it (additional unsprung/rotational weight).
It would be measureably faster with 255/40-17s than with the track pack's 255/40-19,
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.... ok walk into ferrari, buggati, lambo HQ and tell them that they all use 20 inch rims...
on high hp and tq cars, you need a larger diameter tire, for the main fact small tires have smaller contact patches, also having too little unsprung weight in a higher hp application it doesnt help traction
larger diameter tires spin slower to cause the same amount of acceleration as smaller tires, you dont see mustang people going over and asking the miata people to use their rims and tires do ya?
smaller diameter tires of the same grip level as the 19 tires on the mustang would cause a ton of wheel spin and loss of grip, the car already eats through its first gear when accelerating, if anything it needs more contact patch and the only way to get that is to go wider or add diameter and the mustang weighs enough to actually be able to use that extra grip
the brz on the other hand wouldnt gain any grip by getting larger diameter tires simply because you would have less pounds per square inch pushing down on the tires
both the GTR and the bugatti both weight a ton, in fact almost 2 tones, that taller diameter and wider tires is defiantly a necessity ,they have enough weight
rule of thumb if you are having traction problems, add more tire diameter if you can, if your having cornering problems then add tire width