Retaining ring fastening. Minimum thickness for steel tires. Truck wheels.

Shrinkage fastening only. Minimum thickness for steel tires. Truck wheels.

NOT LESS THAN

Retaining ring fastening. Minimum thickness for steel tires. Truck wheels.

·NOT LESS THAN

This gauge to be used in determining flat spots, worn flanges, and broken rims. (See 91.227.)

LAR

FIGURE 9.-Method of gauging worn flanges.

FIGURE 12.-Method of measuring flat spots of 1 and 2 inches.