The harshness of ride from the 40 profile 17" tires I have doesn't alarm me and couldn't possibly be what I would call dramatically different from the 50 profile the car came with. I will be the first to admit I never drove the car on the hancook junk it came with. My 17's were installed at the dealer on delivery day. The ride is still not what I would call harsh.
Performance tires (worth their salt) are generally going to have lower tread wear ratings. Get used to it. If you get a 'real' performance tire and it has a high treadwear rating, be prepared for premature squeeling around corners and compromises in the handling/grip. It's kinda like buying an exotic car and whining about the gas mileage. Really good performance tires that are 'really' good are not going to have a high treadwear rating. If they do, they're reaching for people that not only expect to have their cake and eat it too, but expect it to be cheap as well as good.
Everytime we get compromises in our cars because we are Americans, it's embarrassing. Seriously.
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Mel Gibson only acted the part.
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