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When a vehicle's spec sheet states a vehicle's maximum tow weights are (for eg) 1750/2200 unbraked/braked, does that indicate that that particular vehicle can tow 2,200kg up hill and down dale all day? Or would it be more sensible to limit the trailer weight to say 2,000kg for continuous towing? I appreciate that the tow-ball weight must also be taken into consideration when towing a heavy trailer.
The listed weight on vehicle spec sheets also take into account the vehicle ability to stop (while towing that weight) within in the wof legal limits. this would be more important than the vehicle's ability to tow the weight. Some vehicles may also need the fitment of an external transmission oil cooler, to help keep the temperature down in order to preserve the transmission. The downward weight on the ball is also something to take into consideration in loading the trailer. The amount of towing would depend on the condition of the vehicle and whether it can handle the load you subject it to.
The reason for my question is that we own a 2,000kg caravan and are currently looking at purchasing a new tow vehicle. Do we set our sights on a vehicle that lists 2,000kg maximum braked tow weight on its spec sheet or should we be conservative and opt for a minimum (maximum) braked tow weight of 2,200kg?
I would always try to aim a bit higher as there is a small possibility that the caravan could weigh more if you were to ever add anything extra and you might need that wiggle room.