In the U.K, with effect from 1st August 1998 all Passenger Carrying Vehicles up to 3500kgs Gross Vehicle Weight (M1 Vehicles) can only be fitted with European Type Approved towbars if the vehicle has received European Whole Vehicle Type Approval.
Non M1 vehicles, Light Commercial Vehicles and private imports from outside the EEC are not required to use Approved Towbars.
Most towbar manufacturers have allowed, in the towbar test and approval application, for the inclusion of various accessories, often by including a spacer in the towbar kit, which is removed when the accessory is fitted. This information should be clearly stated in the fitting instructions. If there is any doubt, you should contact the towbar supplier. This applies to all accessories that move the towbar rearwards from the towbar.
Design, Testing and Certification The towbar manufacturer requires the following vehicle data to design a towbar:
The "D" value is calculated as follows:
(GVW x GTW ) / (GVW + GTW) x 9.81/1000 (gravity) = kn
The maximum D value for an M1 vehicle is 17.7kn that represents a GVW of 3500 kgs towing GTW of 3500kgs.
Towing Capacity is related to GVM then each model may have a different value for D. To prevent overloading of the towing vehicle refer to the Vehicle Manufacturers' Handbook to confirm the GTW for your particular model.
Below is a quick checklist to make sure that you are buying a towbar which is fit for purpose and complys' to EC legislation.
If you have any questions please do not hesitate to contact us we will be happy to help, email us at email@example.com.
This guide is written with reference from the National Trailer and Towing Association.