The 635 kg rating I found was for un-braked trailer weight. That got me to wondering, what the brake trailer weight rating was for the Ford Focus. I found that the maximum braked trailer weight for the Ford Focus is about 700 kg or 1540 pounds (https://carleasingmadesimple.com/busine ... ack/65269/
Trailer tongue weight, but not trailer weight, affects vehicle loading. There is usually a Gross Combined Weight Rating (GCWR) listed that includes both the trailer weight and the Gross Vehicle Weight Rating (GVWR) but I can’t find the GCWR for the Fort Focus. We can calculate the GCWR by adding the GVWR (1825 kg) and the braked trailer weight (700 kg) which gives us a GCWR for the Ford Focus of 2,525 kg.
How does this information relate to the FFE? Well we know that the GVWR for the Focus is 2,525 kg and we know the GVW of the FFE is 2085 kg (https://carleasingmadesimple.com/busine ... ack/70880/
), so the maximum braked trailer weight of the FFE must be 2,525 kg – 2085 kg or 440 kg, which is 970 pounds. The maximum un-braked trailer weight for the FFE would be 375 kg or 827 pounds.
These numbers are of course with the vehicle completely loaded, which is never going to happen and the tongue weight alone would reduce vehicle load capacity that could be transferred to the trailer. The maximum load for the FEE is 385 kg so the maximum braked trailer weight would be 815 kg or 1797 pounds and the maximum un-braked trailer weight would be 750 kg or 1575 pounds with the vehicle COMPLETELY empty. But I don’t think I would ever want to go over the 630 kg un-braked rating and 700 kg braked rating listed for the gas focus.
You would have to subtract the vehicle load weight, including passengers, to determine actual safe trailer weight. For example, a 200 pound man with an empty car could safely pull a 1,500 pound braked fishing boat but if he had a friend that weighed more than 120 pounds and wanted to go he couldn’t use the FFE. These trailer weight calculations get pretty complicated pretty quickly so it’s no wonder Ford doesn’t want to provide a trailer rating for the FFE.
I have also been thinking about how we can keep from loading up the drive train of the FFE while towing and possibly keep the drive train from overheating. It make sense that if we don’t load the drive train more than would be expected without trailer then there should never be any issues. The FFE has a speed limiter set to 84 mph, it’s reasonable to assume that the FFE is design to run all day at 84 mph with no adverse effects to the FFE.
I suggest that we take our FFEs out on a long high speed highways and run the FFE at max speed (Texas has highways with 85 mph speed limit so I’m not suggesting doing anything illegal or overly dangerous). Observe the average location of the power indicator. The theory is that if we never power our FFEs while towing above the average power level at maximum speed then there should never be any adverse effects to the power train from towing.
So it appears that we can tow at least an 827 pound un-braked trailer and as much as a 1540 pound braked trailer with our FFE. With load and power management there should never be any adverse effects to our FFEs from towing. I do however stress than these trailer loads are what I am prepared to do based on my own analysis and at my own risk and anyone that follows these suggestions must also do so at their own risk.