Pissed off!,... my grand sport is 1 year old this week, and it's been babied the entire time when it comes to driving over road imperfections. 8,000 miles on the odometer, yet my driver's rear tire has been leaking air slowly since about 4,000 miles. This certainly happened while in motion driving over normal freeways and streets. In the last 2 weeks the leak has become so bad it's been flat (11 psi) twice the next day after having been properly filled the day before! (I've always carried a portable tire inflator in he trunk). This is sooo obvious that there is a manufacturer's problem with these cast aluminum 12" wide wheels on the Z06 and grand sport models. GM should be exposed for denying anyone's claim when one of these are bent or cracked within the warrantee period. What makes me even angrier is that much of this could possibly be avoided if Chevrolet would make the "mag ride update" available for free, instead of the $350 they charge!!!"... many who have paid for this ridiculous charge, (should be free)... have said it makes the suspension and ride, softer and far more compliant while improving the the cornering and handling. I believe this would go a long way toward relieving the stresses these wheels are failing under! I wish we would organize and file a class action lawsuit against GM for these wheel failures! now I have to go through the aggravation, time loss of vehicle usage and probably still have to pay for a wheel repair that itself will likely crack again, (safety concern)... or buy a whole new set of aftermarket wheels !!! I am here, contacting NHTSA to file my complaint!

- Maumelle, AR, USA

I have a 2017 grand sport with approx. 17,000 miles, and am losing air in the rear-left tire. I pulled the wheel and discovered four cracks on the back rim edge, located at 12:00, 1:00, 5:00 and 6:00. There are absolutely no signs of impact to the tire or rim.

- Lower Burrell, PA, USA

At around 10,000 miles, it was discovered that all four wheels were bent. When replacing the rear tires at 17,000 miles, it was discovered that one of the rear wheels had two sizeable cracks on the inside lip. Based on reports from corvetteforum.com, this a major problem with the C7 grand sport wheels.

- Churubusco, IN, USA

2017 Z06 Corvette. Consumer writes with concerns to safety defect and many malfunctions with the vehicles tires.

- Lakeland, TN, USA

My Corvette grand sport with 4900 miles has experienced three bent or out of round wheels. The Chevrolet dealership identified this during alignment process. I am still working with them to find a financial solution. But I have come to learn from forums and from talking with other owners this is a common and perhaps dangerous problem. Wheels can eventually crack and tires can leak.

- Germantown, TN, USA

2017 Corvette grand sport, purchased in June of 2017, only used on weekend and the current mileage is only 930. Just noticed a vibration in the front end when travel on highway at speed 55+. bring the car to the dealership for inspection and the service manager inform me all 4 wheels has been bend and need to be replace. File a case (9-5019078980) with GM customer care center and after 1 week, GM center called and told me this is not cover under the factory warranty. Very disappoint and loosing trust in GM product related to quality, reliability and safety concern for the consumers. This problem with the factory wheel bending or cracking has been report and listed in several Corvette forum and most are related to the 2017-2019 grand sport model. Hopefully there will be an investigation open soon to prevent any further damage causing serious accident similar to the air bag problems.

- Milpitas, CA, USA

When we starting losing air in the left rear tire, we had it checked and a cracked rim was discovered. Did not hit any obvious road hazards, curbs or debris.

- Santa Clara, CA, USA

Right rear wheel cracked, not due to hitting anything I.e. curb, pot hole etc. Normal driving and TPMS sensor activated indicating low tire pressure. Upon careful inspection I discovered the wheel developed a crack. Very common problem amongst owners of late model Corvette grand sports. I've read of scores of Corvette owners experiencing the same problem, some owners experiencing cracked or bent wheels many times on the same car even after several replacements. On the Corvette forum some owners have had cracked wheels on brand new cars with only a few hundred miles or new cars only weeks or months old in the majority of cases GM is refusing to cover the wheels under warranty even though the cars are technically brand new and still under factory warranty. I've spoken to the head Corvette engineer who is in charge of the entire development and design of the car about the problem. His reply is that they were aware of the problem but don't know the cause yet they won't warranty or replace the defective wheels. My car only has 19,000 miles on it and is still under warranty. I'm afraid the same problem will happen to my other wheels. I don't want to replace the wheel out of my own pocket only to have it happen again.

- San Bruno, CA, USA

2 bent wheels under (better than) normal driving conditions on my 2017 Corvette grand sport. Garage kept/covered. Pristine 2-year-old car with 7000 miles. Service dept alerted me to the bends during scheduled maintenance and while investigating a pulsing problem in the front brake rotors. The vehicle is hardly ever driven, has never seen rough roads/city streets/bad weather/etc. The vehicle has never been "tracked" or otherwise abused. This is a "summer only, " weekend vehicle that has been impeccably maintained. There are no visible scuffs/scrapes/bends/bulges or other damage to the tires or wheels. Never hit any pothole/road hazard/debris, *ever.* based on recent online research and information from the service manager, I'm now concerned that these wheels will totally crack or otherwise deform while driving. This is an accident waiting to happen. After opening a case (9-5012193448) and over an hour on the phone, GM has denied a warranty claim and will not further discuss/escalate this issue. GM would not provide a description or copy of the method used to determine "defect vs.damage", or a written copy of the evaluation made by the regional warranty rep. GM refuses to disclose any information regarding other instances of this problem, will not replace/repair the defective wheels, and will not pay for a suitable/comparable 3rd party replacement. I've also read about other owners have the same issues via these links: Https://www.caranddriver.com/reviews/A23705281/2017-Chevrolet-Corvette-grand-sport-reliability/ https://www.corvetteforum.com/forums/C7-general-discussion/4161059-2018-grand-sport-cracked-rim.html

- Elmer, NJ, USA

The wheels on my vehicle are cracked on the rear passenger side. I picked up my (new) car from lamarque auto dealer in new orleans and drove home to beaumont. When I got to beaumont, the low tire pressure warning came on. So today (1-21-19) I took car to discount tire and they found that my wheel is cracked. I' assuming it cracked while driving over 200 miles on I-10 headed home.

- Beaumont, TX, USA

Cracked rim from everyday driving on vehicle. Issue was discovered after putting new tires on vehicle at 14.8K miles. Vehicle was driven for approx 50miles when I noticed that a rear left tire was slowly losing pressure. I didn't recall driving over any significant bumps in road during this period.

- Cumming, GA, USA

During a routine tire installation, the service dept of the dealer from which the car was purchased bent (3) of our grand sport wheels laterally. We have read other reports on Corvette forums about these particular rims cracking and bending with little or no reason for them to do so. We've also read where the ahtsa has been notified by other Corvette owners concerning this problem and yet to date no action has been taken to rectify the situation. Corvette forums have also stated that these wheels can bend easily duration the vehicle operation. These are high performance vehicles with wheels that are substandard. How many people have to get injured or die due to these defective wheels before your Agency forces GM to make definitive changes for the consumer?

- French Lick, IN, USA

Driving down a street in aiken SC (york St) I ran across a manhole that was below street grade. Immediately upon speeding up, noticed vibration. Took the car to local tire dealership that specializes in Corvette tires and they verified that both wheels on the left side were bent. They were both bent on the inside of the wheel away from the spokes. I was going less than 25 mph when I ran over the recessed manhole. GM does not recommend repairing theses wheels since according to them will eventually fail if repaired. That means I have to buy two new wheels for over $1800 out of pocket.

- Johnston, SC, USA

I had 3 bent wheels and 1 cracked wheel after about 10,000 miles

- Hightstown, NJ, USA

Wheels bend out of round during normal use..dangerous and is a manufacturers defect that Chevrolet will not acknowledge.. I am aware of several instances with other C7 grand sport owners this should be addressed by Chevrolet. Fixed at no charge to the owners... the wheel could sheer of the car and result in a serious accident and fatalities

- Brewster, MA, USA

2 bent wheels traveling from tucson to memphis. Pot hole on interstate in tenn. 2 more bent wheels on return trip in nm. A pot hole on the interstate.

- Tucson, AZ, USA

Noticed a vibration in the car at highway speeds. Took the vehicle into the dealer and was told that the wheel was bent. Service manager stated that this was happening to many Corvettes and was due to the stiffness of the tire and the weakness of the factory wheel. GM has denied a claim under warranty.

- West Barnstable, MA, USA

After driving the car the tire pressure warning came on and we started noticing the tire pressure leaking on the right rear of my wife grand sport Corvette, the wheel was taken off to investigate the cause of leak. It was discovered that there was a crack alone the bead ring area of the inside drum area of the wheel. The dealership refused to cover under warranty and didn't offer repairs. The wheel was taken to a reputable wheel repair shop with a guarantee on the repair. After driving the car approximately 1000 mile the same wheel started to leak again. After removing the wheel there was another crack approximately 180 degrees from the repaired crack. After refusing to drive the vehicle to the dealership with a cracked wheel, it was removed from the car and taken to the dealership and also called the GM priority care at 866-636-2273. GM priority care gave me the case number 8-4778215369. The dealership still refused to cover the wheel under warranty but offered to sell me another wheel for $250. The vehicle currently has 19000miles and is my wife's daily driver for work. The car has not been abused or involved in any accidents. It has been painted due to scratches from tornado wind damage. I took pictures before the repair was made and additional picture of the second crack in the same wheel. In my opinion the dealership should have replaced the wheel when the first crack occurred. Now I have no confidence in the quality of the grand sport wheels and will refuse their offer of getting a wheel for $250. After checking with an aftermarket wheel company for replacement wheels, they notified me that GM is aware there is an issue with the grand sport wheel and that I should take it to the dealership for replacement. The car is currently not safe to drive until I get a replacement wheel. See attached photos of the first and second crack in the wheel.

- Spartanburg, SC, USA

2017-2019 Corvette grand sport has a high number of report instances of rims cracking and bending that forum members feel is not normal, not due to hitting potholes or anything. I had never hit any potholes or anything hard, and while having my tires changed, the shop shows me a crack in the rim. On the blog site "Corvette forum", there's numerous people and pictures of people showing their cracked or bent rims. GM is telling people this is normal wear and tear and not dealing with it. This is not normal. Several people have reported multiple tires bent or cracked. Please investigate. I'm sure GM does not have accurate data, people most people report the dealer turns their claim away as not being covered, so it's not getting fully reported. This appears to be a problem only with the grand sport model.

- Hayward, CA, USA

GM is putting defective wheels on grand sport and Z06 Corvettes. These wheels will not withstand normal driving on any highway. The issue is that these wheels bend on impact, be it expansion joints along bridges or small imperfections in the roadway that other cars handle every day. The issue is that GM says these are road hazards and they are not responsible. The wheels were not engineered to take normal driving on roads anywhere. This started in June after a trip I took and the car picked up a vibration. Took it to S dealer and he said the wheels were bent and not covered under warranty and would sell me new ones 2 front wheels for about $1800. I then took the car home and took the front wheels off and had them straightened at a cost of $110 each. I thought that took care of the problem so we drove the car on another trip to nova scotia, Canada. We were on a trip and lost air in the left front tire ( picture below ) it had worn all the way down through all the belts due to the wheels being bent again. See all 3 pictures. These wheels are a safety hazard for these cars to use on public highways as they develop cracks and cause severe tire wear in short periods of time. I had another set of brand new wheels at home. I had to come back home and get them and take them back to Canada to get my car home. On the 1700 mile trip back the car developed a vibration and when I took it back to my tire dealer he said that the right front wheel was bent. The big issue is GM does not track these issues if you do not buy the new wheels from them and it goes unreported. A friend of mine who has less than 5000 miles on his 2019 needs to buy 4 wheels and 4 tires and the dealer even told us there were 2 people the week before that had bent rims on I-71.

- Centerville, OH, USA