Recently the steering wheel on my car began vibrating and the ride became shaky too. My first thought was get the wheels balanced. But when I brought my car to the garage they told me my problem was the tires not the wheels needing to be balanced and suggested replacing the tires. I still have 2 original tires on the car that have 45,000 miles on them and 2 replacements that have under 10,000 miles on them. If anything my first thought is to replace the originals or is there something else I might be missing here?