I suspect your issue may have more to do with the particular vehicle and
the engine's power curve than the tires. As you're looking at the tires
on tirerack, note that beside each tire (except snow tires) is a UTQG
(Uniform Tire Quality Grading) evaluation. The first entry is a number
representing treadwear, with higher numbers representing longer treadwear.
Next is a letter designation for wet traction, with AA being best wet
traction. Last is a letter designation for temperature, with A being the
greatest ability to resist overheating.
If you look at the listing for the tires on your car-- Kumho Solus KH-16,
I believe-- you'll see that they already have the highest available rating
for wet traction. This means you're unlikely to remedy your problem simply
by changing the tire model.
If you're really serious about attempting to achieve better launch
traction, you'll probably need to move to a wider tire. If you have the
195/65R15 tires, you might try switching to 215/60R15. If you have
205/55R16, you might try switching to 225/50R16. In each case, using the
substitution I note will keep almost the same exact tire circumference.
But you'll also need to verify there's room on your car for the additional
tire width. In each case, the tires will be 20mm wider, so you'll need an
additional 10mm of room on each side of the tire. I doubt fender
clearance on your car will be an issue, but clearance between the tire and
strut may be an issue.
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