my car shakes really bad when i go over 55mph

Suonds like you may have dropped a balance weight off the rim. Take it to a tire shop and get your wheels balanced

You should check the balance on all the tires. The rim may be bent nedds to be replaced.

could be a few things. 1 belt broke in tire, 2 tire not balanced properly, or 3 lug nuts or studs may be loose or missing

the alinement or the balljoits may be loose