my car is vibrateing when i go 55mph and above.
Do i need an alignment?

Thanks

 

Check your tire pressure first. Then look for signs of uneven wear.

 

get your wheels balanced

 

before you take it to a shop to get your wheels balanced, check to see if you have any debris stuck to the rim. I had the same problem and i found a small amount of tar stuck to the inside of my rim. After i cleaned it off it took care of the problem. maybe you could have the same problem