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Towing & Load Management
Terminology & Abbreviations
Tongue Weight: The downward load exerted on the tow point of the vehicle by the trailer.
Dry Weight: The total weight of the trailer (load on tires plus tongue load) with all options and fittings as supplied by the
manufacturer, with empty water tanks, excluding fluids not essential for operation on public roads, and without luggage or
personal effects.
GVWR (Gross Vehicle Weight Rating): The total permissible mass of the Trailer. This includes the tongue weight and whatever
you add as cargo (e.g. water, propane, luggage) up to the specified rating. The GVWR must not be exceeded.
GCWR (Gross Combination Weight Rating): This is the total allowable combined mass of a tow vehicle and trailer
combination as determined by the tow vehicle manufacturer.
Camber: Camber angle is the measure in degrees of the difference between the wheel’s vertical alignment
perpendicular to the surface. If a wheel is perfectly perpendicular to the surface, its camber would be 0 degrees.
Camber is described as negative when the top of the tyre begins to tilt inward towards the chassis rail.
Toe In/out: Negative toe, or toe out, is the front of the wheel pointing away from the centerline of the vehicle. Positive toe,
or toe in, is the front of the wheel pointing towards the centerline of the vehicle.
Toe can be measured in linear units, at the front or rear of the tyre, or as an angular deflection. In the case of
MDCUSA products, the “toe in” is measured in inches at the front of the tyre from the chassis rail.
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