Where Is Trailer Measured To Determine What Lights Are Required

Published 12/11/2014

Question:

When you say a trailer tail light kits if for trailers less than 80inch or more than 80, how are you measuring that? I assume its the width of the trailer frame only, but Im having a hard time figuring out why that affects anything other than the amount of wire you need. Thanks.

asked by: Gary K

Expert Reply:

Actually, the width of a trailer is determined by it's widest point. If the wheels are outside of the frame of the trailer then the width is measured for that trailer from outside of the fender to outside of the fender on the other side of the trailer.

If the wheels are under the trailer frame then the measurement is taken at the frame width only.

I have attached a helpful article that explains how to measure a trailer and the article has also got a complete breakdown of the lights and reflectors required based on their size and Gross Vehicle Weight Rating(GVWR). Normally, there is a plate or sticker or label that is attached to the trailer tongue or frame that you can get information from such as GVWR.

Once you have determined which category your trailer falls within, you can let me know and I will be happy to make some recommendations that will work for you.

expert reply by: Jeffrey L