See also:

Tread wear indicator
The tires have wear indicator strips running across or parallel to the tread. The letters TWI are printed on the side of the tire. When approximately 1/16" (1.6 mm) is left on the tread ...

Reverse ®)
The vehicle must be stationary when position R is selected. ...

Installing the ball holder
1. If necessary, remove the cotter pin from the locking bolt and slide the locking bolt out of the hitch assembly. 2. Slide the ball holder into the hitch assembly. 3. Align the hole in the ball ...