How Do I Measure a Trailer Fender?

Updated 09/19/2026 | Published 09/16/2026

Products Featured in This Question

Single Axle Trailer Fender for Enclosed Trailer - Ribbed Steel - 13" to 15" Wheels - Qty 1

(125)

$57.74

CE Smith Single Axle Trailer Fender - 16 Gauge Steel - 12" Wheels - Qty 1

(630)

$37.40

Question:

I’m measuring for a replacement trailer fender. I noticed on the dimensions it states “long” . Is this the width from the outside end of the fender to the other outside end or is it measuring the top of the fender from end to end? I hope I didn’t confuse you.lol thank you

asked by: James G

Expert Reply:

Hey James,

That is a great question! To measure the length of a trailer fender, you'll need to measure from the bottom of the fender (the widest part) from one end to another. The height will be measured from the tallest point, down to where the "line" would intersect with the length measurement "line." I've included an example photo with a standard single trailer fender so you can see the measurements as well.

Are you needing a single or tandem axle fender?

expert reply by: Claire H