Stretch out: On the top, start from the front center lower lip & measure the length over the fender to the same place on the back lower lip. ___________
Tip to Tip: Measure across the fender length, lip to lip at the bottom._______
Height: Place a board on the fender & measure from the lower lip to the bottom of the board._______
Width: Under the fender, measure from the trailer wall out to the outside tip of the fender._________
Radius: Examine how the fender is shaped. Does it have a curved lip on the outside edge? ________
Does it have a curve where it is fastened to the trailer?__________
So, does it have one radius or two? Measure the flat portion of the trailer fender before it starts to curve on either side, & compare this to the total width.__________ This fender has one? or two? ___” radius (curved areas).
How is the fender fastened to the trailer? Bolted on -how wide is the flat lip there on the trailer side? Or, welded on-- and what is the measurement of the lip on the trailer side? _________________
Is there a “fender welt”? (small piece installed between the fender & the wall of the trailer)_____ What is it made of? Rubber, flexible steel, etc.____________
What is the fender material: steel or aluminum? _____________
Measure the thickness of the fender material ACCURATELY---1/16", 1/8"--or thicker?______________________
Visual verification & reference: Take some good close-up pictures with your cell phone of the fender that needs repair AND the fender that does not need repair.