I just had some Uniroyal Tiger Paws put on my 2010 Escape. When I first left the shop, they felt great until I hit about 60ish mph. Then I got the bouncing, steering wheel vibration like they hadn't balanced them correctly. So I took it back and they re-balanced. They said two were out .25 and one was out .5. Not really enough to cause that though the bouncing/vibration took a bit longer to occur, more like 65. But oh my gosh, get over 80 and forget about it. It feels unsafe. This is not fixed. Could an out of round tire cause this and should I bring it back to the same tire place (walmart) or at this point should I find a mechanic to look at it? The car has 139k miles on it. An alignment maybe? Though the car does not pull at all to either side. Thank you
Yes out of round tyres can cause this.. I've experienced it the odd time, but normally only with cheaper tyres. I had a couple of tyres a few years ago that made my whole car bounce slightly due to their sort of elliptical shape.
First though.. have the tyre place check that your new tyres are seated on the rims properly, as this can cause the problem your describing if they're not.
An alignment is certainly in order, considering they have been balanced (twice!)
Did you have the same issue with your old tyres?
If the tires are brand new they shouldn't be out of round unless through manufacturer defect or improper storage. If I understand what they said was that your tires were out a 1/4 to 1/2 ounce. Even the small amount of weight when accelerated to highway speeds can generate significant imbalance. If that is the condition on all 4 tires then the resulting constant shifting of forces would make driving difficult. Have them re-balanced at another tire place. Other things to possibly check out are possible suspension issues such as shocks, etc.