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  1. Trailer Ramp Springs
  2. M-3 and Associates
  3. Dual Ramp Spring
  4. Conventional
  5. 84 Inch Wide Doors
  6. 120 lb Capacity
Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Dual Spring - 120-lb Capacity

Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Dual Spring - 120-lb Capacity

Item # ERS120D81
Our Price: $308.57
Trailer Ramp Springs
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Replace your old trailer door spring with this heavy-duty system. This dual-spring setup lets you easily open and close the ramp door on your enclosed trailer and eliminates the risk of it freefalling. Fits 60 to 82 wide trailer doors. Great Prices for the best trailer ramp springs from M-3 and Associates. Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Dual Spring - 120-lb Capacity part number ERS120D81 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (365)
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M-3 and Associates Trailer Ramp Springs - ERS120D81

  • Dual Ramp Spring
  • Conventional
  • 84 Inch Wide Doors
  • 120 lb Capacity
  • 81 Inch Wide Spring
  • M-3 and Associates
  • Steel

Replace your old trailer door spring with this heavy-duty system. This dual-spring setup lets you easily open and close the ramp door on your enclosed trailer and eliminates the risk of it freefalling. Fits 60 to 82 wide trailer doors.


Features:

  • Ramp door spring lets you easily lift and lower the door on your enclosed trailer without risk of injury
    • Helps to take on the weight of your trailer door so you don't have to
  • Dual springs eliminate the risk of the ramp door collapsing and causing damage or injury
    • If one cable falters, the other spring will prevent the trailer door from freefalling
  • Spring reduces wear and helps prevent damage to door hinges
  • System can be modified to fit your specific application
    • Slide the bracket and cable drum down and cut the shaft to a shorter length
  • Yellow safety covers install on top of the bolt heads to prevent any unwanted adjustments
  • Sturdy steel construction
  • Made in the USA


Specs:

  • Application: 60" to 82" wide trailer door
  • Dimensions: 81" wide
  • Spring capacity: 120 lbs
  • Cable length: 150"
  • 1-Year limited warranty


Warning: It is recommended that only individuals who have experience winding torsion springs install this product. If you have not worked with a torsion spring system before, we recommend contacting a local garage door company to install this system.



9500470 M-3 Enclosed Trailer Ramp Conventional Springs - Dual Spring - 120 lbs - 81"





Customer Satisfaction Score:


Customer Reviews

Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Dual Spring - 120-lb Capacity - ERS120D81

Average Customer Rating:  4.7 out of 5 stars   (365 Customer Reviews)

Replace your old trailer door spring with this heavy-duty system. This dual-spring setup lets you easily open and close the ramp door on your enclosed trailer and eliminates the risk of it freefalling. Fits 60 to 82 wide trailer doors.

by:

First package was delivered damaged, so it was refused. Contacted etrailer and they got one out immediately! Arrived packaged even better!!!



by:

Receive our order quickly and in one piece .... AWESOME SERVICE



by:

Product looks great very timely delivery and friendly service



by:

Works great on the ramp door that I built for a storage shed to keep golf cart in.



by:

I installed this on a heavy fold-down ramp door that I made for hauling my Jeep in an enclosed trailer. The ramp was so heavy that I couldn’t hardly lift it by myself. I bought the dual spring model because I thought I needed it, but I don’t. One spring is all I needed. I can now lift the heavy ramp door with one hand.

Rick

12/3/2020

A year later and I’m still very pleased with this spring assembly. Has made my life much easier. Definitely would recommend this product.



by:

Directions can be a little confusing, since I installed this on a she door, not a enclosed trailer. Left and right are painted and all was clear except on which way cable winds on drums, according to rep you wind it thru front unlike a garage door. Called to confirm because drums are labeled r and l but are reversed as your installing it,which prompted a call call.

Etrailer Expert

Rachael H.

5/31/2018

Thanks for the follow up Brandon. This system is set up so that when you are in the trailer or shed in your case looking out of the down door, the end with the black cable drum and the red winding cone should be on your left. If you are not comfortable or experienced with the installation of torsion springs, it is highly recommended that a local garage door company complete the installation.



by:

Trailer door extra welded extra heavy. This spring has worked great for a year so far, never pushed its limits but never didn’t trust it.



by:

I ordered the assist ramp lift because my ramp door was too heavy for me to lift by myself. After installing the assist lift correctly a 12 year old can lift the ramp door using only one hand. I recommend this product and the price is very reasonable for what you get with this company.

Charlotte P.

2/2/2018

Im very happy I purchased the assist ramp lift. It is still working great after a year of using it.



by:

It’s not the one I wanted



by:

This enclosed trailer door ramp spring pulley system is great. It is so smooth unlike the one that came wiyh my pace American trailer. Doesn't grind or squeek. Does exactly what it is supposed to for an outstanding price! Trust me, I did the research. I had to install by myself and it wasn't bad at all. Should have read the directions first so I had it turned around the wrong way. Lol. But it was a 2 minute fix to get back on track. I really am glad I found this.
Definitely would recommend.



by:

Everything fit perfectly and worked as intended



by:

Great service



by:

Yes, I know it is recommended for personnel whom have utilized a torsion spring before, but I am definitely on the stubborn side. Before I could contact my local garage door guy, I pulled this out of the box to see if I needed to make a modification. So, I shortened the bar. I then noticed that the old one had to come down. Then I happened to notice that the placement of the plate almost lined up to the old one. Two minutes later, I was too far in the installation to not finish this job myself. Total time it took me was 1hr45min. 15 of those minutes were spent unwinding the cables because I didn't read the directions to put it on with the ramp down. Other than that, it was a breeze. Customer service was also the most amazing experience ever. I called to make sure I was ordering the right part from Pace and they informed me that my trailer was to old and to go to a recommended dealer 30 minutes away. etrailers crack staff told me to go out and measure my trailer twice, to make sure it would fit. Voila, 2 minutes later, i knew I had the right part.



by:

Bought this spring assembly for my 7x14 enclosed trailer ramp door. Delivery was quick and it fit perfect. Its been a full year and still working well. If i remember correctly a friend and I installed it in about an hour.



by:

The mounting plates are adjustable so there adjusted to fit my Pace 16' trailer perfectly. I had to install the cable pulleys backwards from what the directions called for and with the set screws facing the outside walls as well.

I installed mine with the door closed not open against what the directions say as well. When you put some tension of the springs with the door closed you must stretch out the springs some before using the set screws. If the springs are not stretched out some the door will barely open and stop because the springs will have to room to turn and expand.

The real trick is getting the cables wound up even and tightly. I needed my parts ASAP so I paid next day air which was very cheap for such a large part.



by:

The gate spring worked great and still is after a year. before I was lifting this gate
by hand. This gate is several hundred pounds. With this system I can lift it with
one hand with ease,well worth the money.



by:

First off, Deborah was awesome to deal with and had the ramp door spring shipped super fast. Thank you!
I had never installed a torsion spring and this one took me two hours, including removal of the old one off a Pace cargo trailer. You might need to cut off part of the tube ends to fit your application. I put a grinding wheel on my skilsaw and chopped off 3 inches from each end. I used my existing mounts on the header and so I removed the ones on the new spring assembly...4 bolts. The mounting plates on the assembly are easy to slide to fit my application. Installation onto the header was very quick and easy. Again, four bolts that are a bit soft and easy to strip...I used my existing hardened bolts that were exact match in every respect...only harder alloy. The cables came next. I suggest using existing hardware if it's in good shape. The provided pins and cotter pin mount left too much slop at the ramp. Good bolts and a good locking nut was what I used and allowed for plenty of relaxed movement without compressing the eye of the cable end. Vise grips come in handy when rolling the cable on the drums as you'll want to keep the bar assembly from moving while loosening the drums to roll up the slack of the cables...tighten the two set bolts on each drum and you're ready to start winding the springs. Make sure the BLACK drum is mounted to your left while looking out from inside the trailer or the entire assembly will need to be flipped. I used some rebar for winding rods and ground them down a touch to fit easily inside the cavities of the spring winder. This worked well for me, but the proper winding rods are no doubt safer and should be used or simply get a professional garage door company to do the winding part and balancing for safety reasons. Once wound according to the instructions, lock the set bolts onto the rod and you can remove the winding rods. I used the top of my trailer to help hold the rod while tightening the set bolts...all the while holding another rod in the cavity for safety. From there, you will want to readjust your drums on the cables to get an equal amount of tension on each cable. One cable will likely be a lot tighter while the other relaxed upon rasing the ramp. With the door up and closed, loosen the drum set bolts on the LOOSE cable drum and spin it to get a tighter cable and lock the bolts back into place. Raise and lower the door a time or two and go back into the trailer with the door closed and readjust the drum that has cable slack until they are fairly equal.
That was it and other than the appeals for safety around the entire process, it was easy to do.
Unless you are used to working around stuff like this, I think having a garage door company wind the springs and adjust the drums would be money well spent to avoid any potential injuries. I doubt it would cost much because that part goes pretty quickly and they would have the experience to do it in about 15 minutes or so.



by:

Product came in a timely matter through UPS. Installed it with no problem at all but you MUST read the instructions first so that you know what you're doing. Turned 38 quarter turns and then a few more (4) after that. Not sure if I should do a few more turns because the ramp door still takes two hands to close.

Etrailer Expert

Laura E.

1/18/2017

Thanks for your review and your business, Jim. We recommend contacting a local garage door company to install this system.



by:

Item fit perfect and has function flawlessly after I installed it !! Thank you Etrailer !!

Marty B.

7/7/2017

Excellent no issues



by:

Very easy to order, Quick deliver, the parts arrived in good condition even thogh the boxes was ripped open during shipping, I have not had time to install it yet o
. so no picture is available.

John A.

9/16/2020

Easy to install, work great. money well spent.



by:

Best service ever, I was packing for an a tv trip and the spring broke as I closed the rampthree nights before leaving. Trailer saved my vacation big time by shipping quick and the video really helped a lot. Thanks etrailer



by:

This was a good fit and a good price.



by:

I reinforced the rear ramp of my aluminum trailer and needed a bigger torsion spring set to compensate for the extra weight. The information I found on etrailer.com made it easy to choose exactly what I wanted.
The best part was the shipping speed. I ordered it Monday and received it by Wednesday.
Not only was it cheaper than the local trailer supply it was quicker.
Easy to install and works like a charm.



by:

I've order many items from this company. First website is perfect very quick,also every item u may need with a item your ordering is shown (such trailer wiring connectors and so on) shipping is fast as we can ever ask. And all information for products is available including wiring diagrams and ext. Hands down great company.Just keep it up!!



by:

Exactly what it says it is. Looks like a nice piece. Easy installation. Best deal on the internet. I searched for probably hours trying to find a better deal and you wont. They didnt have it in stock but ended up shipping it straight to me and I had it before they thought I would. Great Service. Very easy to work with. Will always come here and look for future trailer parts.


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See what our Experts say about this M-3 and Associates Trailer Ramp Springs

  • Max Width of 81" Enclosed Trailer Ramp Spring # ERS120D81
    I reached out to M-3 about the dimensions for the Enclosed Trailer Ramp Spring # ERS120D81 and while he wasn't able to tell me the overall dimensions we believe that the absolute max amount of room you'd need is 91". This is listed as 81" wide but I'm not sure if that is the overall width or just the width to the mounting brackets. If 81" is not the overall width then you'll likely be in the ballpark of about 91.
    view full answer...
  • Recommended Gate/Ramp Assist and Hinge for Trailer Build
    The 2K Torque Ramp Spring # RS16933RH is an industrial strength spring. It is designed for up to 90 degrees of deflection, but most people by hand can cause no deflection at all. It is designed to be used with the LH # RS16933LH, and is for heavy ramps or doors like in the attached photo. I would assume it is too strong for your application based on your wording. You may want to consider a different style spring like the Enclosed Trailer Ramp Spring - Dual Spring, 81" Wide # ERS120D81...
    view full answer...
    Image 1 for Image 2 for
  • Could Enclosed Trailer Ramp Spring # ERS120D81 Be Used on Momentum Toy Hauler
    Yes, the Dual Spring RV Trailer Spring part # ERS120D81 that you referenced can work well for the rear door of a Momentum Toy Hauler. It would mount above the ramp door and would make lifting the ramp much easier. The installation instructions for this product are recommended for individuals who have experience winding torsion springs. If you have not worked with a torsion spring system before, we recommend contacting a local garage door company to install this system.
    view full answer...
  • Can Conventional Ramp Door Spring # ERS120D81 Be Shortened
    The Conventional Ramp Door Spring # ERS120D81 can be shortened quite a bit actually as you can loosen the brackets that hold the coil of the spring and mount which is attached to the spool can be loosened and slid inwards to make the setup quite a bit shorter. Overall the setup is 81 inches but if you needed it to be shorter you certainly could.
    view full answer...
  • Ramp Springs for the Front and Rear of a Snowmobile Trailer
    For the rear opening I recommend using enclosed trailer ramp spring # ERS120D81. It has a capacity of 120 pounds. And for the rear I recommend # 362SA6 which has a 120 pound capacity. Professional installation by someone with torsion spring installation (like a garage door company) is recommended because working with these types of springs can be dangerous. You would not be able to use a spring such as # RS16933RH because it produces 2,000 pounds of torque. This would require a very have...
    view full answer...
  • Ramp Spring for 72 inch Wide Door on Trailer
    You'd need a wider setup like the # ERS120D81 since your ramp door is 72 inches wide. The ramp spring you mentioned is for 6 inch wide doors so you'd want the # ERS120D81 which is 81 inches wide and would work well. This also has a spring capacity of 120 lbs which would make your 200 lbs door seem much lighter.
    view full answer...
  • Dimensions For Trailer Ramp Spring On 18 Foot Haulmark Trailer
    You will need to measure to be sure, but I believe the Enclosed Trailer Ramp Spring - Dual Spring, 81" Wide # ERS120D81 will fit your 18 foot Haulmark Trailer and I've included the dimensions of this hit for you. Each spring is 22-1/2 inches long and 2-3/8 inches in diameter.
    view full answer...
    Image 1 for
  • Solution for Trailer Torsion Ramp Spring that has Either Too Much or Too Little Lift Assist
    Yes, it sounds like your springs are too heavy duty which is making them nearly impossible to find the "sweet spot". Your current spring has a 160 lb capacity which for a lighter style of ramp spring we have the part # ERS120D81 that has a capacity of 120 lbs and would give you the ability to find the sweet spot in terms of ramp tension.
    view full answer...
  • Weight of Enclosed Trailer Ramp Spring ERS120D81
    Though I can't give you a reason why, I can tell you that the Enclosed Trailer Ramp Spring # ERS120D81 has a shipping weight of 27 lbs, which is going to be very close to what the actual product weight is. It is 81 inches wide with a 120 lb capacity and has 2 springs on the assembly. I've added a link to a video review of this product for you to take a look at as well.
    view full answer...
  • Dual Ramp Spring Recommendation for Ramp Door that is 78 inches Wide
    An 81 inch long dual ramp spring like part # ERS120D81 would be your ideal solution. Your ramp door is 78 inches long so this being a few inches longer would be ideal.
    view full answer...
  • Available Trailer Ramp Spring with a Measurement of 70 Inches Between Cable Rollers
    I found a trailer ramp spring that will work for you application. The Enclosed Trailer Ramp Spring, # ERS120D81, that has a measurement of 71-5/8 inches from cable roller to cable roller. The overall length is 81 inches long. The attached picture will give you the full dimensions for this spring.
    view full answer...
    Image 1 for
  • How Many Turns of Spring is Recommended for M-3 Enclosed Trailer Ramp Spring # ERS120D81
    I checked with M-3 and when you are ready to wind the spring on the Enclosed Trailer Ramp Spring # ERS120D81 you will need to use two 1/2 inch diameter bars (of around 18 inches long). You will insert the first bar into the winding cone of the spring and pull down. The system is then designed for 10 full revolutions of the spring. It will be easier to balance the door if the spring is wound in quarter turns. Please note that we highly recommend only installing this if you have had previous...
    view full answer...
  • Recommended Spring to Help Close Ramp on a 2006 Gearbox Toy Hauler
    The Enclosed Trailer Ramp Spring # ERS120D81 that you referenced is an excellent option to help you lift the ramp on your 2006 Gearbox Toy Hauler. It has a 120-lb weight capacity so if your door weighs over 120 lbs, say 150 lbs for example, then you would only be having to lift that extra amount, which for example would be 30 lbs. The 81 inch width will fit great once installed since your door is 96 inches wide. If you do not have experience winding torsion springs then we recommend contacting...
    view full answer...
    Image 1 for
  • Recommended Size of Ramp Spring for 7 x 16-Foot Enclosed Trailer
    Since a 7-foot trailer width is 84-inches the nearest ramp spring size will be the 81-inch size like # ERS120D81. The linked review video will give you details on this item. All ramps springs are shown on the linked page. The installation instructions for this product are recommended for individuals who have experience winding torsion springs. If you have not worked with a torsion spring system before, we recommend contacting a local garage door company to install this system.
    view full answer...
  • Could ERS120D81 Ramp Door Spring Be Cut Down for Use on a 6 ft Wide Enclosed Trailer
    The whole assembly (81 inches wide) can be trimmed down as short as 62 inches long, so it would work perfectly at 72 inches.. The spring has a capacity of 120 lbs. We strongly recommend having a professional overhead door technician install the spring for you. The spring needs to be tensioned, and if it lets loose accidentally it would fling tools at high enough velocity to easily kill someone so it isn't a good job for a do-it-yourselfer.
    view full answer...
  • What is the Torque Specifications for Heavy Duty Trailer Ramp Spring # RS16933RH
    Ramp spring # RS16933RH is designed for heavy duty equipment trailers and it is rated for 2K torque rating. The matching left side is # RS16933LH. For light duty trailers these springs would be way too strong. We do have other options such as # ERS120D81 designed for enclosed trailers. These springs come in a few different lengths from 66 inches wide to 96 inches wide and can be trimmed a little on the ends to fit in between sizes. For open utility trailers I recommend the Rack'em Double...
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  • 1990 Kingston Trailer Ramp Lift Assist Options
    We have a couple options for trailer ramps springs. The first one will work great if your ramp rides on a 1-1/2 inch shaft. For that you would want the Ramp Spring - 2K Torque for 1-1/2" Shaft - RH # RS16933RH or # RS16933LH. Or we have ramp springs like the Enclosed Trailer Ramp Spring - Dual, 81" Wide # ERS120D81, this spring installs like a garage door spring. There is a lot of tension, so you want to make sure it is installed by someone who knows how to compress these springs and...
    view full answer...
  • Overhead Clearance Necessary to Install Enclosed Trailer Ramp Spring ERS120D81
    According to our friends at Redneck Trailer Supply, the reel on the end of the Enclosed Trailer Ramp Spring, # ERS120D81 measures 5 inches in diameter, so you would need a bit more than 5 inches of room on the header above the rear door of your snowmobile trailer.
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    Image 1 for
  • How to Determine Correct Ramp Spring for Installing a Ramp on a Storage Shed
    Choosing a ramp spring for your shed door requires you to know the weight and size of the ramp to ensure the cable is long enough and that the system has the required lifting capacity. A system like the 81-inch dual-spring # ERS120D81 has a 120-lb capacity. All ramp springs can be seen on the included link. The installation instructions for this product are recommended for individuals who have experience winding torsion springs. If you have not worked with a torsion spring system before,...
    view full answer...
  • Recommended Ramp Torsion Spring for 82-Inch Wide Enclosed Trailer
    The best size of trailer ramp spring for your trailer is going to be the 81-inch dual torsion spring # ERS120D81. This dimension is the end-to-end length as you'll see in the video. This unit consists of two torsion springs on one shaft and it has a capacity of 120-lbs. This spring can be bolted or welded to the trailer header and it comes complete with dual cables and hardware. Please note that this spring is intended to be installed by someone who has experience with torsions springs....
    view full answer...
  • Longer Version of Enclosed Trailer Ramp Spring part # ERS80S66
    We have the Enclosed Trailer Ramp Spring part # ERS120D81 which is 81 inches long as compared to the # ERS80S66 which is 66 inches long and no longer available.
    view full answer...
  • Recommended Dual Spring Trailer Ramp Assembly For 2000 Haulmark Trailer
    We don't have the replacement spring, but we do have the Enclosed Trailer Ramp Spring - Dual Spring, 81" Wide # ERS120D81 to replace the entire assembly. This will give you the spring, the drum, the bar, the brackets and the cable. This unit has a spring capacity of 120 lbs. This product is designed with dual cables so in the event that one is accidentally cut, the ramp door will not free fall to the ground.
    view full answer...
  • Ramp Door Spring for 72" Wide Door on Wells Cargo Trailer
    What you can do is use Enclosed Trailer Ramp Spring - Dual Spring, 81" Wide # ERS120D81 which will work for doors which go down to 62 inches wide. You can take a look at the video review of this product I've added for you.
    view full answer...
  • Trailer Ramp Spring Recommendation for a 66 Inch Wide Door
    As you mentioned, we do offer the Enclosed Trailer Ramp Spring - 81 Inch Wide, # ERS120D81. This ramp spring needs a minimum of 56 inches in order for the drums and cables to wind properly. With your rear ramp door being 66 inches wide, this ramp spring would work for your trailer. The weight capacity is 120 pounds. I pulled the Enclosed Trailer Ramp Spring - 96 Inch, # CB250D96SHD, from our warehouse and also spoke with my contact at M-3 to see if there was any way that this would work...
    view full answer...


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