One thing to look for is the date codes on the tires, don't let them put old tires on.
Example of a tire manufactured since 2000 with the current Tire Identification Number format:<div ="bordered">

<table border="0" cellSpacing="0" cellPadding="2" width="95%"><t><tr><td>In the example above:
DOT U2LL LMLR 51</span>07</span></td><td></td> </tr><tr vAlign="top"><td>
DOT U2LL LMLR</span> 51</span>07</span></td><td>Manufactured during the <strong ="blue">51<sup>st </sup>[/b]week of the year</td> </tr><tr vAlign="top"><td>
DOT U2LL LMLR 51</span>07</span></td><td>Manufactured during 20<strong ="red">07[/b]</td> </tr> </t></table>
While the entire Tire Identification Number is required to be branded onto one sidewall of every tire, current regulations also require that DOT and the first digits of the Tire Identification Number must also be branded onto the opposite sidewall. Therefore, it is possible to see a Tire Identification Number that appears incomplete and requires looking at the tire’s other sidewall to find the entire Tire Identification Number
The use of a partial Tire Identification Number on the one sidewall (shown above) reduces the risk of injury to the mold technician that would have to install the weekly date code on the top sidewall portion of a hot tire mold.