What is an ISO Neck Profile?

faqs/masses-and-dimensions

An ISO neck refers to ISO 1726 which is a standard which more broadly covers dimensions, angles and gaps between a tractor and a trailer to ensure that there is no risk of fouling between the two.

ISO 1726 is not a legal requirement so it is possible to have both tractor units and trailers that do not comply. For instance, some urban trailers will have a "short" neck with a kingpin and landing legs that are closer the trailer bulkhead.

Published: Tue 14 Nov 2023

Updated: Thu 11 Apr 2024