<p>Question 1. Your question will appear here. Feedback will appear here. Tire 1 Tire 2 Both Neither C D Question 2. Once a week At least once a month Every six months When you get your oil changed Question 3. The vehicle manufacturer The tire manufacturer A certified mechanic The salesman who sold you the vehicle Question 4. Underinflated tires An overloaded vehicle Uneven tread wear All of the above Question 5. When the tread is worn down to 2/32 (or 1/16) of an inch Every year Every 10,000 miles When the "wear bars" become level with the tread</p>