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  1. Trailer Ramp Springs
  2. M-3 and Associates
  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
Retail:$169.06
Our Price: $149.93
You Save: $19.13
Trailer Ramp Springs
Shipping Weight: 21 lbs
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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 (360)
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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





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   (360 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:

Great spring for my 4 ft door on a small mc trlr! It arrived w a damaged roller n you quickly sent a replacement! I had a friend who installs garage doors to install it for me and it works perfectly! Thank you! The door was getting a little too heavy for me to safely lift.



by:

Is a great replacement part for on of our enclosed trailer. Had it a year now and no issues. Thanks etrailer!!



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".

David

2/23/2023

All is good. I havent used it much, but when I do I like it.



by:

Not happy at all. I had to use old part to make the installation complete. Extremely poor packaging caused the broken part.



by:

The installation instructions wasn't very detailed. The front and back of the instruction sheet were for double springs and I had ordered single spring. Figured it out and it works great.



by:

The Spring I purchased broke after 6 mo nths,

Etrailer Expert

Katrina D.

8/8/2023

I am sorry to hear that this broke for you. Luckily this does have a 1 year limited warranty.



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:

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

Etrailer Expert

Jenny N.

7/27/2022

Thank you for letting us know about the missing brackets. I will have our customer service team reach out to assist.



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.



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:

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



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great product and easy to install



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by:

The coil spring works great. I saw a ramp door online and copied it for my shed. I built the ramp door from the shed double opening doors and used most of the parts from etrailer.com The dual spring is used to assist opening and closing the ramp door. I calculated the weight and called etrailer.com and they helped me size the dual spring.



by:

After destroying my single door spring I opted for this dual spring setup due to the door always being heavy to raise.
Wow what a difference! 3 turns on each spring and I can easily lift the cargo door with 1 hand (fingers).
etrailer always comes through when you need them. Fast shipping and a great product.
Door spring installed on a Mission 22ft 4 place deck over sled trailer.


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

Do you have a question about this Trailer Ramp Spring?


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 Jacob H
Installed by:
Jacob H
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S

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