RonSm

Replaced single tire due to flat at Discount Tire.
Car drives slightly bumpier than before. Steering wheel does not shake. Have only driven up to 40mph.
Thought I could be imagining it, but someone else also drove the car only 50 feet and unprompted asked me if something was wrong with the new tire.
Brought the car back into Discount Tire and they said balance/tire was fine, the wheel has a slight bend that could be the cause.

These are the 'facts':

1. Prior to replacing the wheel, I did not notice any issues
2. Drove 50 miles home on it in middle of night after a flat tire. Then another 5 miles to Discount Tire 2 days later.
   1. Discount tire guy says driving on the run flat would not have caused wheel damage if there were no potholes encountered (i was driving on 'good' roads)
3. Replaced single tire -- Driver Rear tire with OEM (summer) tire. New tire has 9/32" tread. Other 3 tires have 9800 mile & 6/32" tread
   1. Discount Tire guy says tread difference should not perceptibly cause a ride difference
4. Wheel on replaced tire now has 11 1/4ounce weights. Before it had no weights (none of the other tires have weights)

Suggested next steps?
1. Should I remove the balance weights and see how it drives (and put them back on or bring back to shop if it drives worse)?
2. Get a new wheel and see if that fixes the problem?
3. Rotate rear wheels and see if I notice a still bumpy but different ride?
4. Replace the right-rear tire too?
5. Something else?

BearZ06

I missed that you said the wheel was bent. That is your problem, have it straightened or if possible replace it.

Kracka

Repair the bent wheel (wheel repair is cheap), and always replace tires in matching axle pairs. Imagine walking around in shoes with one thick sole and the other thin.

BillBall

11 1/4 oz wheel weights?! Get a road-force balance.

Andybump

Does discount tire agree there is a problem? What do the advise? Why is the wheel bent? Ive never dealt with them. But they are supposed to be good. They should figure out the problem.
I would not want a bent wheel.

tadda

And there you have it...

Have the wheel repaired and see if this fixes the problem...

RonSm

Thanks. Bent wheel makes sense, just odd that I didn't notice it before the tire change -- unless it happened while riding on the flat.

Kracka

My guess is it happened with the flat tire. Or, you're just much more cognizant and aware now that you had an issue and repair work done.

Vetteman Jack

I agree with getting the wheel repaired for the bend (or replace it if needed) and see how the car performs.

Bondojohn

Love discount tire. Had same experience with my tire. Great place to do business with.

Red Mist Rulz

Yeah, no wheel / tire combination should require that much weight. I have to wonder if that tire is defective.

Devereaux

I totally agree. The tires on Vettes don’t require more than one or two weights. That is the first clue there is a problem.

The bent rim certainly could be the issue, but i’d recheck things, especially the balancing weights, after you have made corrections. My personal experience is that shops vary one from another. Go to a Discount Tire where they deal with high performance tires and you will get a good dynamic balancing. Don’t and you might not.

Acpantera

2.75oz really isn't too concerning on a tire/wheel assembly that is as heavy as the vettes rear wheel. 1% rule for max balance weight, the rear wheel is big and the Michelin ZP tire is crazy heavy.
re-clocking the tire on the rim might reduce the amount of corrective balance weight.

winders

The thread is a year old…I suspect the problem has been resolved one way or another already….

gliot1

You do not need to replace tires in pairs. The only time you need to replace tires in pairs is if the tires are of different tread type. Like tires can be replaced one at a time with no issues. You will not get a bumpy ride or a car leaning...lol. in 50+ years of driving having a number of flats, I have never had issue. I have had one or two tire dealers tell me that when they want to sell two tires. Discount has never told me that, unless the wear is excessive and the tire is no longer available. The only real issue if a tire is bouncing or bumpy is one of balance. I have seen issue with wheels so out of balance a tire balance cannot compensate. The only solution is for a wheel rework shop to true and balance the wheel. Also as noted always do a road force balance. Years ago I had a C4, and they were known for needing road force, or the rear tires might hop at high speed. I have seen similar on unload3d pickup trucks. Road force cured.

EvanD

Need, want, better... all could apply.

Acpantera

Hate that

Joe C5 C2

That is the problem when the original poster doesn't come back with the final solution. Everyone is just left hanging.

Red Mist Rulz

Oh man, I misread it as 11 and 1/4 ounces.....

Even so, that's a lot more weights than I've even seen on C8.

Chevy Cust Svc

This is not the Corvette ownership experience we strive for. Our team would like the opportunity to learn more about the tire on your C8 and investigate ways we can potentially assist. When you get the chance, please send an email to socialmedia@gm.com. Be sure to include your Username and Forum name in the subject line, then provide additional details about your experience in the body of the email. We look forward to your contact.