Max. bumper height for passenger vehicles - 22".

Max. bumper height for all other vehicles with a GVWR of:

• 4,500 lbs or less - 24"front and 26" rear;
• 4,501 to 7,500 lbs - 27"front and 29" rear;
• 7,501 to 10,000 lbs -28" front and 30" rear.

Max. bumper height for 4WD and dual wheel trucks - 28" front and 31" rear.