While I agree the vin plates do show gross train weight (car & trailer) and gross weight (car fully loaded including roof rack load) and axle weights for the car, there is no clear description on most and furthermore no actual statement of towing capacity.
Now with mty HGV and extensive towing knowledge, I can work out with simple math, what size trailer I can tow. But there are a lot of caravanners out there who can not read a vin plate let alone understand it.
So that is why I would like to see a vin plate clearly placed on the car (not hiden in the door post between doors on a 4 door car), idealy it should be in the boot area of a car, as that is mostly where the dead weight goes and where you stand to hook on your trailer. Then the VIN plate should state what unbraked and what braked trailer weight can be towed, plus a defined hitch weight.
The hitch weight is even left to the towbar manufacturer to define and display.
I tow probably all the varieties of trailer available and it is a nightmare trying to explain or workout some axle weights. for instance, I got stopped while towing an empty twin horse trailer because the trailer was very nose down. The VOSA inspector was adament that the front axle wheel bearings on the box were clapped out as they were hotter than the rear ones. I took issue and explained that purely by construction a horse trailer is very nose heavy until a horse stands over the axles. So it is quite normal to expect that the majority of the trailer weight is born by the front axle when the trailer is empty. I had the policeman agreeing with me and the VOSA man throwing his dollies out of his pram. But the one that mattered could see the logic for once.
Now with mty HGV and extensive towing knowledge, I can work out with simple math, what size trailer I can tow. But there are a lot of caravanners out there who can not read a vin plate let alone understand it.
So that is why I would like to see a vin plate clearly placed on the car (not hiden in the door post between doors on a 4 door car), idealy it should be in the boot area of a car, as that is mostly where the dead weight goes and where you stand to hook on your trailer. Then the VIN plate should state what unbraked and what braked trailer weight can be towed, plus a defined hitch weight.
The hitch weight is even left to the towbar manufacturer to define and display.
I tow probably all the varieties of trailer available and it is a nightmare trying to explain or workout some axle weights. for instance, I got stopped while towing an empty twin horse trailer because the trailer was very nose down. The VOSA inspector was adament that the front axle wheel bearings on the box were clapped out as they were hotter than the rear ones. I took issue and explained that purely by construction a horse trailer is very nose heavy until a horse stands over the axles. So it is quite normal to expect that the majority of the trailer weight is born by the front axle when the trailer is empty. I had the policeman agreeing with me and the VOSA man throwing his dollies out of his pram. But the one that mattered could see the logic for once.