Trailer Ramp Springs - 79 Inch Wide Doors

Hello Darrin, thanks for reaching out. For your 56" wide door what I recommend is the Conventional Ramp Door Spring #362SA5. This is made for the 56" wide doors, and the 85 lb capacity will make opening and closing the rood much easier.…

Hey Scott, yes each of the ends of the dual ramp springs like the part #M346FR that you referenced turn independently. How heavy is your tailgate?

To test the weight of your ramp door, you will want to get the door all the way down to the ground and then on a scale of some kind (a bathroom scale can be used for this if it's the only thing available). This will be when the door is at its…

The spring with the black cable drum should always be mounted to your LEFT, standing on the inside of the trailer looking out. This is very important for proper operation. Dual spring systems, like #ERS160D96, have a red-coned and a black-coned…

To determine the correct weight springs you will need a scale to determine how much weight is on the door when it lays out on the ground. You will place the scale on the ground in the center of the landing path of the door edge. This will tell you…

I'd go with a double spring personally, Scott. These are typically going to be used on more heavy duty applications like your enclosed trailer with a pretty heavy door. In order to get a proper replacement though, you'd need measure the width…

For a 200 lb trailer ramp door we have the Conventional Ramp Door Spring part #362SA8HD which would work great as it has a 230 lb capacity. You'd need to have a professional wind it for you but it would easily work great for a 200 lb trailer ramp…

You won't need to obtain the weight of the entire door, just the un-hinged side. You'll want to find the amount of weight you'll need to overcome to easily lift the door. You could use an old bathroom scale, place some blocking on it, and…

Jared, the 150" long cables that come with the Conventional Ramp Door Spring for 8' Wide Enclosed Trailer #M354FR are unfortunately the only size offered with that part. What you could do instead, is buy the Replacement Cables for…

Hey David, I am not totally sure which two springs you are comparing but just because a dual spring torsion ramp door spring like the part #ERS160D96 has two springs doesn't always mean it has more capacity than a single spring. The springs can…

Hello Vance, Awesome job on building your trailer! I am happy to find the right spring for you, but in order to do I am going to need quite a few measurements. I have included a picture of what measurements I need, can you please respond back with…

Hey Rene, so the ramp door springs like the part #M394FR are not all identical in spec and capacity. So what that means is a double spring setup does not mean it's just the same spring on both ends compared to a single spring. This is why the…