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I'm one of those people that think that the C7 wide-body wheel cracking problem is blown way out proportion on this forum. The front wheels on the C7 GS and Z06 are 19 x 10, the same size as the rear wheels on the C6. The C7 Stingray rear wheels are 20 x 10. I don't believe that any of them are designed or manufactured any differently. None of them are fully forged. Some are rotary/spin forged. Why would this only be a problem on the C7? With that being said, it's not difficult to understand why a 12" wide rear wheel would be more prone to bending or cracking than a 10" or 11" wide wheel. I mean.....If you choose to buy a car with very low profile tires, and a firm suspension, you should be careful how and where you drive it. For instance, if you have any kind of raised curb entering your driveway, the stress of repeatedly running into it can lead to a bend or crack.
The real problem is the low profile, and run flat sidewall stiffness. Yes, the wheels can be made from a better alloy, or whatever. But it's really a combination of everything, including the potholes everywhere.
I personally think while run flat tires serve a purpose, they are a major cause of all the bent and cracked leaking wheels that people are having a problem with. I helped a friend of mine that owns a tire store change my tires from the Michelin run flats to the Continental non run flat tires I have now and was amazed at the weight difference between the tires and the extremely hard side walls that the run flats have on them. I guess that is a price you pay for having the security of driving a car that has no spare tire with the run flats vs the softer side walls and more forgiving tire and easier on the wheels that the non run flats have.
Tires tires tyres... Loads loads loads... Design intent, design intent, design intent.... GM Chief Designers are living in DENIAL!!... Some of us Corvette drivers are wise to you guys. 😒
From: In a parallel universe. Currently own 2014 Stingray Coupe.
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While the reported cracked/bent wheel problem may be out of proportion to the total number of owners with the wider wheels on their car, the fact remains that there are a number of owners of wide body cars that have had repeated instances of wheel damage on their car. Something just does not add up - could very well be a quality problem with the wider wheels.
Haven’t heard of many buyers of aftermarket forged wheels having this problem. And not many owners of narrow body cars report wheel issues (at least from what I have read).
Crappy roads undoubtedly can cause issues with wheels and the low profile tires (w/stiff sidewalls) transmit the shock to the entire wheel assembly, but the design process should have taken some of that into account. Just my $.02.