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John's got it right......... Posted by Herb Hirsch [Email] (#114) [Profile/Gallery] (more from Herb Hirsch) on Thu, 10 Apr 2008 12:32:41 In Reply to: Re: Wheel Size question, silver-rocket, Thu, 10 Apr 2008 08:15:46 Members do not see ads below this line. - Help Keep This Site Online - Signup |
As you go up in wheel diameter you generally go down in profile or aspect ratio. More significantly, each setup choice has its own combination of characteristics regarding ride quality, handling and other factors. I'll try to summarize this.
16" with 215X55X16 tires: Nice ride, not susceptible to pothole damage. Not for very aggressive handling, but quite safe. In an all-season tire variant, you could get away with using these all year long in a moderate-snow climate.
17" with 225/235X45X17 tires: Harsher ride, susceptible to pothole damage. Also, this setup may be more prone to hydroplaning when the thread is low. Nice improvement in looks and handling; this is the combination used by Saab on Aero's. My 2007 came with the larger tire size, 235X45X17.
If you're going to use these you should plan on a second set of wheels with snow tires (for the winter, unless you live in a warm climate like South Florida, Texas, Brazil or Columbia). A 16" wheel with 215X55X16 snowtires works very well, and its not particulary prone to pothole damage or hydroplaning.
18" with 235/245X35X18 tires: Very harsh ride and very susceptible to pothole damage. With much wear, this setup will hydroplane easily. Pretty useless in the snow, so a second set of snow wheels are almost mandatory.
The looks are incredible; handling will definitely change, possibly not for the better. Chassis and suspension design/upgrade issues would likely have to be addressed in order get a real handling improvement with this tire/wheel setup. Even if this is accomplished, there likely will be a price in terms of gas mileage, tire life, tendency to hydroplane and the likelihood that tooth filings will be easier to loosen.
Please consider the above as the opinion of one. Others may refine what I've said, or outright disagree. Consider the unique experiences they offer; it'll help you get to a conclusion that's right for you.
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