Wheel bearing seals should be checked for __________________.

Step 5: Do Walkaround Inspection
[...]
Right Rear
Condition of wheels and rims--no missing, bent, or broken spacers, studs, clamps, or lugs. Condition of tires--properly inflated, valve stems and caps OK, no serious cuts, bulges, tread wear, tires not rubbing each other, and nothing stuck between them.
Tires same type, e.g., not mixed radial and bias types.
Tires evenly matched (same sizes).
Wheel bearing/seals not leaking.
[CDL DRIVER MANUAL FINAL]