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  1. Trailer Ramp Springs
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  3. Single Ramp Spring
  4. 84 Inch Wide Doors
  5. Conventional
  6. 77 Inch Wide Spring
Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Single Spring - 80-lb Capacity

Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Single Spring - 80-lb Capacity

Item # M374FR
Our Price: $158.01
Trailer Ramp Springs
This item qualifies for Free Shipping
Shipping Weight: 22 lbs
Quantity: 
In Stock
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Replace your old trailer door spring with this heavy-duty, conventional ramp door spring. This single-spring setup lets you easily open and close the ramp door on your enclosed trailer. Fits 38" to 79" 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 - Single Spring - 80-lb Capacity part number M374FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (268)
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  • Videos (1)
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M-3 and Associates Trailer Ramp Springs - M374FR

  • Single Ramp Spring
  • 84 Inch Wide Doors
  • Conventional
  • 77 Inch Wide Spring
  • 80 lb Capacity
  • M-3 and Associates
  • Steel

Replace your old trailer door spring with this heavy-duty, conventional ramp door spring. This single-spring setup lets you easily open and close the ramp door on your enclosed trailer. Fits 38" to 79" wide trailer doors.


Features:

  • Ramp door spring lets you easily lift and lower the door on your enclosed trailer without risk of injury
    • Helps take on the weight of your trailer door so you don't have to
  • 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
  • Orange safety covers install on top of the bolt heads to prevent any unwanted adjustments
  • Sturdy steel construction
  • Made in the USA


Specs:

  • Application: 38" to 79" wide trailer door
  • Dimensions: 79" wide x 4-3/4" tall
  • Spring capacity: 80 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.



9500472 M-3 Enclosed Trailer Ramp Conventional Springs - Single Spring - 80 lbs - 77"

CB80S77S





Video of Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Single Spring - 80-lb Capacity

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of M-3 and Associates Trailer Ramp Springs - Single Ramp Spring - M374FR

Geoff: Hello, everybody. This is Geoff at etrailer.com. Today, I'm going to take a look at this conventional single spring ramp door spring for up to a seven foot wide enclosed trailer and this has an 80 pound spring capacity. Now, this will let you replace your old trailer door spring with this nice heavy duty conventional ramp door spring and it's ramp door spring lets you easily lift and lower the door on your enclosed trailer without the risk of injury. Basically, it'll help take on the weight of the trailer door so that you don't have to. The spring does reduce wear and also helps produce damage to your door hinges and the spring is designed to mount one way for proper operation and basically what you want to look at is when you're installing the spring, the cable drums are marked with a splotch of paint.

You can see right here there's a black mark on this one and then there's a red mark on this one right here. If I'm standing on the inside of the trailer looking out, the cable drum with the black spot on it, that should be on the left hand side of the trailer when you install it.Now, to install this, there is a warning. It is recommended that only individuals who have experience winding torsion springs install this product because when you get to winding the spring, tension gets very dangerous, could cause injury. If you've not worked with a torsion spring system before, we do recommend contacting a local garage door company to help you install this system. What's nice also, this spring system can be modified to fit your specific application.

You can slide the mounting bracket, the bearing and the cable drum down and then cut off the remaining shaft if you're going to put this on a shorter length or shorter width to work. If you slid this all the way down, the minimum you could put it on would be a 38 inch wide trailer door or if you slid it all the way out, the maximum would be a 77 inch wide trailer door. It does include the mounting brackets with the bearings and the hardware to install it.Also, on the table here, it comes with the 100 length, which is just about nine feet of 1/8 inch diameter cable and the hardware to install that. Comes with a nice set of instructions and it comes with this set screw cover that, once you get your spring all tightened down, this will go over the set screws once they're tightened. This is a nice sturdy steel construction.

It is made in the USA. Few specs, if we measure from the end of this pipe all the way to the end of this end is going to be 77 inches wide. The diameter, which will be the drum diameter, is 4 3/4 inches. And we mentioned the spring capacity is 80 pounds.But that should do it for the review on this conventional single spring ramp door spring for up to seven foot wide enclosed trailer and this has an 80 pound spring capacity..

Customer Satisfaction Score:


Customer Reviews

Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Single Spring - 80-lb Capacity - M374FR

Average Customer Rating:  4.7 out of 5 stars   (268 Customer Reviews)

Replace your old trailer door spring with this heavy-duty, conventional ramp door spring. This single-spring setup lets you easily open and close the ramp door on your enclosed trailer. Fits 38" to 79" wide trailer doors.

by:

Got package which was opened ,,, Missing the main brackets and need 8 ft assist ramp helper


Comments
Thank you for letting us know about the missing brackets. I will have our customer service team reach out to assist.
-- Etrailer Expert Jenny N - 07/27/2022


by:

I bought this to retrofit an enclosed trailer that was originally built with exterior springs.
This is a major improvement over the other style and money well spent. Everything went smoothly according to the instructions. I was good at 38.
My door is now a "one hand wonder".




by:

It was what ordered, had all parts that was needed & arrive in a reasonable time.




by:

The spring was great but the cables were too short.




by:

Fast shipping, good people too do business with, just give them a a call they will help anyway they can thanks for everything




by:

Took less than 4 hours to fit and install. I added a ramp to a double door cargo trailer was a strain to close until I added this spring now can close with ease. Perfect for my now motorcycle trailer




by:

great product and easy to install




by:

This product worked great! I just got installed last night on a ramp door that I built for a shed. No problem and everything functions well. No problem winding it just watch a couple videos first and be very very careful




by:

Exactly as described. I was concerned because processing of order took so long according to the order tracking but it did arrive on time as promised and installed fairly easily.




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by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


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:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


Installed on our 2015 cargo trailer to replace broken unit. Works flawlessly and would order from etrailer again if we need parts.




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


The M394FR ramp spring I purchased a year ago has been working great. It was easy to install and out performs the original spring on my 24’ car hauler trailer.




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


We received our door spring and the drums were damaged. I called etrailer and they sent new ones out quickly so we could get our trailer door fixed right away. They were most excellent in customer service :)




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


Complete kit, no alterations or additional parts needed. Totally bolted into existing structure. Will use e-trailer again in the future.




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


use it on my daily use trailer and everything is working great a year later , thank you.




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


Easy to follow instructions. Works grea t.


Comments
Still working as designed. Easy install.
Mark - 12/31/2022


by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


I added this to the front trailer door which never had a spring assist. It installed easy and works great on the 60" wide ramp door.




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


Product is good and quality was as expected. Instructions were decent. Packaging was very poor. Product was dropped into oversized box with no packaging materials. Arrived with rod sticking out of the end of the box and a crack in the cable wheel. Wasn't worth the effort to return, so I used as-is.




by:

Review from a similar M3 Ramp Springs in Trailer Ramp Springs


Easy to install, makes opening and closing the ramp door a breeze.


Comments
Works great
Tim - 10/05/2022

25
267
Show More Reviews

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

  • Replacement Rear Ramp Spring for 2013 Triton PR-187
    I checked out your 2013 Triton PR-187 and the ramp spring part # M374FR that you referenced would work well.
    view full answer...
  • How Many Turns Are Required For the Springs On The Conventional Ramp Door Spring # M374FR?
    The instructions for the Conventional Ramp Door Spring # M374FR state to wind the spring 38 quarter turns or 9-1/2 full turns. At this point you will want to test the door operation and make 1/4 turn adjustments adding tension or removing tension to balance the door. The door should be open when winding the springs.
    view full answer...
  • Hitch and Ramp Door Spring for Look Element Cargo Trailer
    To install a hitch, you'll want to go with an adjustable width RV hitch, the correct part will depend on how far apart your frame members are. • For an 18-51 inch frame spread, use # C13701 • For a 22-66 inch spread, use # C13704 From what I saw on the manufacturer's website, it looks like your trailer has a ramp door. We don't offer a shock absorber-type system for that, typically a garage door style torsion spring is used. The exact setup needed will depend on the inside width of the...
    view full answer...
  • Overhead Door Springs On Enclosed Trailer Frequently Breaking
    With your over head garage door springs frequently breaking you may not have the correct capacity springs for your door. We have kits that range from 80LBS # M374FR up to 250LBS # CB250D96SHD. The weight rating is not the door weight but the amount of force required to raise the door at any given point. The easiest way to check this is with a scale while raising the door. If you can tell me the weight you are seeing on a scale I can help find the correct system for your door. The Ramp...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S

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