So lately my car has been shaking when I hit highway speeds of 65/70 mph and I've determined the cause to be the two front tires which are pretty worn (The ones in the rear however are good). Anyways, I took two other tires I had to walmart to see if they could mount them. They said no because the there was a sidewall difference.

The ones that are currently on my car are 185/65/14 and the ones that I want to put on the front two wheels are 185/60/14. My question is will replacing the two front tires with the other ones I have cause any problems or will everything work out?

 

Bump

 

Having unmatched tire sizes is unsafe and definitely not the wisest choice. If you can only replace two tires, they should match the two you're not replacing. But, ideally, you should be buying 4 tires that are of the size your car is recommended to have (check driver's door channel).

 

Alright... thanks for the advice, I'll bite the bullet and just get 4 new tires.