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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 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…

Jared, the Replacement Cables for Conventional Ramp Door Spring #M339FR is not going to work with the Conventional Ramp Door Spring for 8' Wide Enclosed Trailer #362SA8207 but it does work with the Conventional Ramp Door Spring for 8' Wide…

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…

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…

Hey Scott you will need to get the width of your ramp as well as the weight of the ramp to pick out what you'd need. For example the part #M394FR is for 8 foot wide ramps and has a weight capacity of 185 lb. I attached a link to all of the…

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…

Your door is a little too narrow for the spring you mentioned but we do have a solution that is the correct size with the part #CB250D96SHD which has a 250 lb weight capacity and is for ramp doors that are between 80 and 96 inches in width.

Hi Cody, The Ramp Spring #RS16933RH is 7/16" thick.

Sounds like you are looking for a rear door/ramp spring kit for your trailer. For that we have the Enclosed Trailer Ramp Spring #ERS120D81 which would work well. This should work well for you but I also attached a picture of it's dimensions for…

In order to properly weigh your door to figure out the correct spring you only need to find the weight when the ramp door is down. You do not need to remove the door to find this weight. You will need a scale in order to measure the weight, a…

The spring capacity for the ramp door spring will need to meet or exceed the weight of the door. If you have a 195 lb door then the closest option we have that will be able to lift this is the Conventional Ramp Door Spring for 8' Wide Enclosed…