08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Tire sizes for the 18s

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Old 11-12-2008, 11:28 PM
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Tire sizes for the 18s

I think there should be a sticky for what diferent size tires other than the 225/40 R18 can fit with our stock 18s. Has anyone else tryed a different size on our rim? Just will help out some of us on buying all season or winter tires. I am going for safe but cheap.
Old 11-13-2008, 12:05 AM
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A lot of people on this board install tires that are too wide for the wheel. Ideally I would like to install a 235/40/18(.5 tallr and 10 mm wider) tire however all tire manufacturors suggest using a wheel that is at least 8 inches wide for a 235/40/18. Our Stock 18s are 7.5 inches wide.

Other options
225/45/18 Stock HHR SS tire size (Larger diameter)
215/45/18 Stock SS/SC tire size

That is about it from what tire rack is showing.
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