Echo car vibration (assuming tire problem)???

[echo_blair]

Hi - I have a 2004 Echo hatchback and I absolutely LOVE the car. I've had almost zero problems with it since I bought it new.

Two problems (the other I'll post separately)... vibration problem:

A few weeks ago, I had my winter tires taken off the car (and taken off the rims) and then two NEW tires installed on the front (Rovello tires from Wal-Mart) and the other two older tires re-installed onto the rims on the back. Now the car vibrates slightly (but enough to be annoying) when driving over about 65. At first I thought maybe the "techs" at Walmart didn't balance the rear tires properly so I had it re-done at a different garage... but it's still doing it.

I've had the brakes checked, and I don't think it's a coincidence that it happened after the tires were switched over. Could it be a problem that I didn't put 4 new tires on at the same time? The older rear tires still have a decent amount of tread. Or could it be an issue with the two new tires on the front?

Any suggestions would be appreciated since it's been very frustrating.

[EchoThat]

I had a similar thing going on, sort of, with my wife's Sentra not long ago. After the old tires got used to their new positions on the car and got aquainted with their new-tire friends, all the noise and vibrations settled down. Seemed like they just needed some time to develop new wear patterns.

[Mr. Green]

My wife's Echo had a similar problem - the front right wheel was bent.