Max. bumper height for automobiles with a GVWR of:

• less than 2,500 lbs - 22";
• 2,500 to 3,499 lbs - 24" front and 26" rear;
• 3,500 lbs or more - 27" front and 29" rear.

Max. bumper height for trucks with a GVWR of:

• less than 2,000 lbs - 24" front and 26" rear;
• 2,000 to 3,000 lbs - 27" front and 29" rear;
• 3,000 to 5,000 lbs - 28" front and 30" rear.