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  1. Trailer Ramp Springs
  2. Redline
  3. Single Ramp Spring
  4. Left Hand Spring
  5. 11 Inch Wide Spring
  6. Steel Alloy
Ramp Spring - 2K Torque for 1-1/2" Round Shaft - LH

Ramp Spring - 2K Torque for 1-1/2" Round Shaft - LH

Item # RS16933LH
Our Price: $23.91
Trailer Ramp Springs
Shipping Weight: 3 lbs
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Great Prices for the best trailer ramp springs from Redline. Ramp Spring - 2K Torque for 1-1/2" Round Shaft - LH part number RS16933LH can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (220)
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Redline Trailer Ramp Springs - RS16933LH

  • Single Ramp Spring
  • Left Hand Spring
  • 11 Inch Wide Spring
  • Redline
  • Steel Alloy

  • Left Hand Ramp Spring
  • High quality steel alloy
  • Provides approximately 90 degrees of deflection
  • Measurement of spring legs from coil to tip: 3-3/4"
  • Width of coil: 2-1/2"
  • Overall length: 10"
  • I.D. of coil: 1-1/2"
  • Application: 1-1/2" round shaft

Diagram showing dimensions of the spring

Note: The bars need to be mounted flat to the surface on which they are being used.

RS16933LH Ramp Spring - 2K Torque for 1-1/2" Round Shaft - LH

Video of Ramp Spring - 2K Torque for 1-1/2" Round Shaft - LH

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

Video Transcript for Ramp Springs Review

Speaker 1: Today, we're going to be taking a look at, and showing you how to install ramp springs for the 2000 pound torque rate for inch and a half shafts. The left hand side is part number RS16933LH, and for the right, you'll need part number RS16933RH.Now, these springs are designed to aid you in lowering and lifting these heavy ramps. If you don't have any springs installed, you know it can be quite a bit of a pain. As you're lowering your ramp down, you kind of have to be under it. You don't want to just let it drop .. Well, I guess you can, but you might cause damage to it, and vice versa.When you're trying to lift it up, you're going to lift up the entire weight.

With the springs installed, they've got a 2000 pound tension rating, so as we lower the gate, as we raise the gate, it's going to be much, much easier.Now, this is what I would call a medium/heavy duty utility type trailer. We'll also show you on a very heavy duty utility type trailer, the use of two of them for those much larger ramps, the triangulated style ramps. Those tend to be a lot heavier, so we'll show you that, as well.Just to give you an idea, however your ramp's held in place, you'll want to, of course, unsecure that, and then you'll see our ramp's going to come down much easier. It actually kind of floats there. We'll push that down.

That'll keep it closer to the ground. We can get our equipment on and off, then when it's time to shut them back up, much easier process than what you're probably used to, especially if you don't have springs, or if your current springs aren't in good working order.You can see our old spring. It's become worn, and it's not near as effective as it was. You see how that's pointing off, kind of in that rearward direction It just means it's been fatigued over time, so we're going to be able to replace it with a new spring. It's going to give us much more effect.Now, the left hand and right hand is going to determine which side of the pin you're going to be putting it on.

If you want it on the right side, you want a right hand spring, and if it's going on the left side, you're going to want your left hand spring.To ensure we get years of great service out of the ramp springs, they're made of a high quality alloy spring steel, so they're going to return to their original position for years and years.To ensure you have plenty of room, we're going to go over the specifications of the spring, just to give you an idea about the size. From outside of our spring to outside of our spring, we've got 2 1/2 inches. Inside and inside's going to be about and inch and a half. From the spring itself, to the end of each arm that sticks out, is going to be 4 inches, so you definitely want to keep that in mind, and make sure that you've got clearance for that, and also that, that spring will make contact with something within that 4 inch range.To begin your installation, you'll need to remove whatever's holding in your hinge pin. It's going to be the large inch and a half diameter pin that runs through here.

In our case, we've got a bolt and a nylon lock washer. We're going to use a 9/16 to get that removed.You also want to hang on to your hardware, because you're going to need this to put it back in. It keeps this pin from sliding in and out. You can see our old spring mounted here. We'll move our pin out, and the idea is to free that up. Now, this ramp's going to be very heavy, and when you pull that pin, it's going to want to fall down. You need somebody to give you a hand, or if you can handle it yourself, however you want to do it, just make sure, as you pull this pin, that, that doesn't fall down and hurt you.Now, we can remove that old spring, set it aside, and replace it with our new one. Now, we're going to be putting our spring on the other side. We've got an accommodation for one here or here, so it doesn't matter how you want to do it. Make sure you get it where you need it, though. Then, our gate hinge is going to go right in between there. As we install it, we can place that pin through.Now, as we replace our ramp onto the trailer, and install our pin, of course, we want to ensure that the pin passes through the middle of our spring, and we also want to make sure that the flange on the ramp goes in between the spring and the flange on our trailer.Now, to finish it up, we'll just reinstall the hardware that we removed to take that old one off.As we said, with these really heavy ramps, they look about the same as the other ones, but they're much thicker steel. It really is a problem, when it comes time to lower them. You're going to have to fight it. You're really going to have to put weight into it, and it can be slightly dangerous. If you have anything underneath there without steel toes on, you'll likely run into something. Same way, going up. Just make sure you get a good hold it.Then, you're putting yourself right underneath them, so if you we're to slip or your hand comes off, it can come back at you. Those springs are going to help us out a lot, with that situation.Now, just like before, we're pulling that pin out, although this time, we don't have any keepers to put it in, so we'll slide this one on, just like that, bring the pin in, a little further, we can get our other one put on.After we have our springs installed, there's a huge difference in the operation of our ramp. We'll go through that same process as before. You could see it actually hold my ramp there. At that point, we just need to press it down a little bit. That's going to make it much easier getting our equipment up and on it.Now, to raise it up, it takes a lot less effort, as well.Overall, our ramps are going to be much easier to use, but a big key is, they're also going to be much safer. That'll complete our look at the ramp springs.

Customer Satisfaction Score:

Customer Reviews

Ramp Spring - 2K Torque for 1-1/2" Round Shaft - LH - RS16933LH

Average Customer Rating:  4.7 out of 5 stars   (220 Customer Reviews)


These ramp springs really took the work out of raising and lowering my heavy 3 fold ramps needed for a more long and level approach to our 10 ton trailer. I always looked for help when needing to raise them, now I can almost do it with one hand. It took a little work installing them because the old system had to be rebuilt somewhat. I kept the same 1" pins and used a 1 1/16" ID X 1 1/2" OD sleeve for the springs to work on. They were well worth my time. I`d rate this an excellent product.

Bill R.


Still work great! They gave me a lot more flexability moving equipment without always looking for a hand or trying to raise them myself.


I think we should have ordered these many years ago. Amazing how just a little extra item can be appreciated at the beginning of and end at unloading time can make the day that much more pleasant. A real pain in the back saver/muscle relaxer. 11#'s of lift effort vs 58#. Why waste the energy doing 58 times two ramps 2 to 10 times a day when you don't have to?


We installed spring and lowered ramp. Spring bent and did not assist on lifting ramp anymore. Very disappointed

Etrailer Expert

Heather A.


The ramp spring is designed to be used with a 1 ½ round pipe not a square pipe which might cause the ramp spring to bind. You also may want to use more than one spring on heavier ramps.


I have a unique project I'm working on that will utilize these ramp springs and provide improved performance once integrated. Excellent product and quick hassle-free ordering and delivery.

Etrailer Expert

Brooke M.


Unique, you say...sounds intriguing. Do tell!


They worked


Exactly what I needed. Good price and it was shipped quickly.
Online descriptions were thourough.



Can someone tell me how to install trailer assist springs, please!

Patrick B.


The Redline Ramp Spring RS16933LH is a replacement spring and is only part of the ramp spring system on a trailer. To use this spring on your trailer you must have ramp hinge with a 1-1/2 inch diameter rod or pipe where the ramp meets the trailer. The spring slips over the rod with the tension of the spring against the ramp and trailer when the ramp is in the up position. The spring should not be welded to the ramp or trailer, the tension and the rod will hold the spring in place. The springs we carry are designed for heavyweight steel doors or ramps commonly found on heavy equipment trailers or car haulers. If your trailer is not set up to accept a hinge spring, a hinge would need to be fabricated and installed.

Kim K.


7h x 8.5w door with wt. of appx.100lbs. ?how many and what size helper springs will I need to install for appx.20-30lb.force to pick-up?

Patrick B.


The ramp springs like part RS16933LH that we carry are meant for heavy ramps, not for a 100 lb door. They do make springs like these for trailer ramps that weigh considerably less, but we do not carry them, nor do our suppliers. If you have an enclosed trailer, you might be able to use something like this part, ERS160D96.


I haven't installed them yet. But the customer service has been amazing, after a simple mistake was found


They were a b**** to put on but got her done by myself works great.


My 16 ft mower trailer is loaded with tools from the shop rebuild so I have been having to use my 20 ft implement trailer to haul my sub compact tractor on when mowing the in-laws yard. The ramps are very heavy which was never a problem for occasional use but doing it multiple times a week was getting old so I went looking for a solution. These springs were easy to install and made all the difference in the world. The trailer is now much more user friendly. Wish I had bought them years ago.


My gooseneck trailer has the extra wide ramps on it. Each ramp covers half the trailer. These ramp springs definitely help raise the ramps. I only wish the fingers (as I call them) were about 2 inches longer.


I had to have 2 back surgeries, and I was not to pick up hardly any weight for a number of weeks. I had a neighbor help me install the ramp springs. After that I was able to lift the ramps with almost no effort at all. I am very glad I got the springs.


works great .. takes a lot of back ache out of the ramps


The springs are okay, but etrailer is awesome. Super-fast shipping and amazing follow up.


Need two on each side… one is not enough


I got what I expected. Thanks for the great service.


Two points of consideration, first the ramp springs worked great and make a world of difference when lifting my ramps. Second was the instructional video. Which made the install process simple and accurate.


Product was as described & fit was good. Delivery was faster than stated. Will require some mods to trailer to gain the best benefit from springs. Will order from etrailer in the future for my trailer needs.

Grady P.


Im very pleased with my parts. They were delivered in a timely manner. Once I installed they worked perfectly and will purchase from etrailer with all my trailer needs.


Heavy duty springs worked great. I was thinking about using hydraulics to raise and lower my trailer ramps until I found out about these springs from

I recommend this product, worked great!!!!!


Our company installed these to assist with heavy folding ramps on a customer's trailer. They really helped with reducing the effort needed to fold the ramps up from the ground. We used 2 springs per ramp. Great product & great price.


Very happy with how fast the delivery was. Keep up the good work, Etrailer!


I was very impressed on the lifting pressure of these springs. The lift weight of my ramps were approximately 75 lb. I added 2 springs per ramp and now can lift a ramp with one finger, approximately 5 Lb. They were a very good addition to my 3 axel gooseneck trailer.


I purchased these for our paving trailer that has bifold wood lined ramps. These springs did help but the ramps are still two man ramps and I put 5 on each ramp


I still have them, sitting on my garage floor, in the original box that I received them in.

They are the WRONG SIZE, and when I wanted to return them (yes, more than 30 days after the purchase), I was advised that they would accept them, but I needed to send them via UPS, and they will deduct about half the price I bought them for, to cover for their shipping.

SO, I am NOT happy, and will never buy from you again... SORRY!


Excellent product my workers will not have to strain their backs trying to raise the ramps on the trailer. With these springs assisting anyone can raise the ramps now. I look forward to doing business in the future. Thanks Billy R.


This was a very smooth transaction! I needed a spring that was less then 4" wide due to how the ramps were fabricated on our truck. I looked and looked, luckily i found your site that had the dimensions shown. Thank you.

Show More Reviews

See what our Experts say about this Redline Trailer Ramp Springs

  • Will the Ramp Spring # RS16933LH Make My Trailer Tailgate More Manageable?
    Yes, the Ramp Springs # RS16933LH will definitely make your tailgate more manageable when lowering or retracting. However, it is important to note that these particular springs are only designed to fit a 1-1/2 inch shaft on your tailgate. This part only comes with a single spring. I went ahead and attached a video that shows you how the tailgate will be affected with the spring in use.
    view full answer...
  • Availability of Trailer Ramp Springs to Fit 1-1/2 inch Diameter Shaft
    Since you have a 1-1/2 inch diameter shaft you would need the part # RS16933LH for the left hand side and then part # RS16933RH for the right hand side. These have plenty of torque to make lifting either of the ramps very easy.
    view full answer...
  • Ramp Spring Recommendation for 200 lb Door/Ramp on a 1-1/4 inch Shaft
    For a 200 lb door/ramp that is on a 1-1/4 inch shaft the part # RS16933LH and # RS16933RH would be a great choice. These ramps provide 2,000 lbs of torque which would be needed for a ramp that weighs as much as yours and is as long as yours. The spring is designed for a 1-1/2 inch shaft, but we have checked before and have been told that it will still work fine on a 1-1/4 inch shaft as well.
    view full answer...
  • How Many Degrees of Deflection can the Ramp Spring # RS16933LH Do
    The Ramp Spring # RS16933LH that you referenced can do 90 degrees of deflection easily so they would work well for you. I attached a review video for this product for you to check out as well.
    view full answer...
  • Dimensions and Lift Capacity of Ramp Spring # RS16933LH
    I contacted our representative at Redline about Ramp Spring, part # RS16933LH. He informed me that the overall length of the spring is approximately 10-1/2 Inches and the width of the spring is 3-3/4 Inches. The measurement from each ear to center of spring is about 5-1/4 Inches, and the spring is made to fit over 1-1/2 Inch bar. The metal rod that forms the spring is just under 1/2 Inch in diameter. I used photoshop to show the dimensions of Ramp Spring, part # RS16933LH, (see picture). For...
    view full answer...
    Image 1 for
  • Can the Ramp Spring # RS16933LH Be Heated Up and Bent?
    By heating up the Ramp Spring # RS16933LH you do risk damaging the tension in the spring steel.
    view full answer...
  • Sizing of Ramp Springs
    The Ramp Spring, 2K Torque for 1-1/2" Round Shaft, left-hand, # RS16933LH is intended to fit a 1-1/2" round shaft. Placing on a smaller diameter shaft does not cause it to be ineffective but it will be less effective than if properly fit.
    view full answer...
  • Does the Ramp Spring # RS16933LH Help Open or Close When being Used Trailer Door/Ramp
    Using your terminology, the spring closes as it is flexed when the door is lowering. The spring part # RS16933LH that you referenced is designed to apply torque to help lift a ramp door all the way up. If you check out the picture I attached you will see how it will look when installed with the ramp all the way up. As the ram would open the spring would flex which would apply torque on the door to make it feel lighter. You want the ramp shaft the spring is installed on to be as tight...
    view full answer...
    Image 1 for
  • How to Determine the Length of Cable to Use on an Enclosed Trailer Ramp Door
    If you lower the ramp door on the trailer you can determine where you would attach a cable. Measure from that point diagonally to the upper corner of the opening, same side, and you would need a cable at least that long. Or, you could measure the height of the opening (A) and the length of the door when opened (B). Then you would multiply (A x A) + (B x B) = C squared. So if the opening and the ramp were both 8 feet tall you would do 8 x 8 = 64 + 8 x 8 = 64 to get 128. Then you would take...
    view full answer...
  • Installation Instructions for Redline Left Hand Ramp Spring # RS16933LH
    In addition to watching our video review I attached, to use this spring on your trailer you must have ramp hinge with a 1-1/2 inch diameter rod or pipe where the ramp meets the trailer. The spring slips over the rod with the tension of the spring against the ramp and trailer when the ramp is in the up position. The spring should not be welded to the ramp or trailer, the tension and the rod will hold the spring in place. Note that the Redline Ramp Spring # RS16933LH is a replacement spring...
    view full answer...
  • Wire Diameter of Redline Ramp Spring # RS16933LH
    The Redline Ramp Spring # RS16933LH referenced in your question features an inside coil diameter of 1-1/2 inches (for a 1-1/2 inch shaft) and the wire diameter, as measured with a digital caliper, is 0.465 inches. We do not currently have a ramp spring like this available that matches the 5/8 inch wire diameter that you mentioned. I have attached a short video demonstration on this spring, along with a link that will take you directly to our available selection of springs that you can...
    view full answer...
  • Can Redline 2k Ramp Springs Install on 1-1/4 inch Diameter Shaft
    For a 200 lb door/ramp that is on a 1-1/4 inch shaft the part # RS16933LH and # RS16933RH would be a great choice. The spring is designed for a 1-1/2 inch shaft, but we have checked before and have been told that it will still work fine on a 1-1/4 inch shaft as well.
    view full answer...
  • Available Ramp Springs for Trailer Door
    The ramp springs, # RS16933LH for the left hand side and # RS16933RH for the right, are heavy-duty springs usually used for large equipment trailers or car haulers. Right now these are the only springs we offer from our manufacturer.
    view full answer...
  • Availability of Replacement Ramp Springs for 6" Ramp Springs
    The closest springs that we have to what you are looking for are the 4" springs # RS16933LH for the left hand side and # RS16933RH for the right hand side. These are rated for 2,000 ft/lbs and will do a good job at helping you lift your ramps. I would try checking to see what your current springs are rated for as well. If you have an older trailer then it could be that they are simply wearing out but if it is a newer trailer then you may need springs that are more heavy duty.
    view full answer...
  • What Size Shaft Fits Heavy Duty 2,000 Foot Pound Ramp Springs
    If stretched far enough the coils in ramp spring # RS16933LH can get a little smaller. A 1-7/16 inch diameter bar could work better but they are designed for a 1-1/2 inch bar so you shouldn't have trouble. This is the left hand side spring. For the right hand side use # RS16933RH.
    view full answer...
  • Ramp Springs for Flatbed Car Hauler Trailer with 220-lb Ramp
    For your 82-inch wide ramp whose weight you estimate at about 220-lbs, the 2K ramp springs # RS16933LH and # RS16933RH should work well as long as you have a 1-1/2-inch round shaft to match the springs' inside diameter. If you check out the linked video on these items you'll see that they worked well on smaller ramps that were a bit lighter than your ramp will be. Since the springs provided a bit more tension than necessary in that application they should be perfect for yours.
    view full answer...
  • Replacement Trailer Ramp Spring Options
    The ramp springs we have include part # RS16933LH for a left hand spring and part # RS16933RH for a right hand spring. These are rated with a 2K torque and fit a 1-1/2" shaft. It does look like the ends of the springs for your application popped out of place so you might try removing the shaft and realigning everything prior to ordering replacements. If you do end up replacing your springs you'll need to make that 1-1/2" dimensions mentioned above matches up. Attached are some review...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Recommended Ramp Spring to Assist With 200 Pound Gate
    For your 200 lb gate that is 50" long I recommend using the # RS16933LH and # RS16933RH. These have a high quality steel alloy construction and provide approximately 90 degrees of deflection. They will do a great job helping you lifting and lowering with 2,000 lbs of torque. I recommend starting with one of each on each side and adding more if necessary. These are designed to fit a 1-1/2" shaft for installation.
    view full answer...
  • Replacement Trailer Ramp Spring for 1-1/2 inch Diameter Shaft
    The left hand ramp spring part # RS16933LH and the right hand # RS16933RH would work for you. These are 2k rated springs that fit a 1-1/2 inch shaft. They are a little shorter though as they overall 10 inches long.
    view full answer...
  • Left Hand Vs. Right Hand Placement of Ramp Springs on a Trailer Ramp
    Right hand side would refer to the passenger side of the trailer and the left hand side would be the driver side. The part # RS16933LH is the left side and the part # RS16933RH is the right hand side. Both of these would work great on a 1-1/2 inch diameter shaft.
    view full answer...
  • Recommended Ramp Springs For Heavy Equipment Trailer
    The Redline Ramp Spring like part # RS16933RH and part # RS16933LH will help with lifting the ramps you said you are building for your trailer. I would recommend 1 spring for each ramp. These springs are made of steel alloy, these springs provide approximately 90 degrees of deflection and are designed to help lift a ramp with 2,000 pounds of torque.
    view full answer...
  • Can Ramp Springs Be Installed On Enclosed Trailer Rear Door To Replace Torsion Springs?
    While we have never installed the Ramp Springs Right # RS16933RH or Left # RS16933LH on an enclosed trailer door we have seen someone install them on a utility trailer. I have included an image below showing their setup You will need to add the bar for the springs to mount on as well as a strong surface for the end of the spring to act on for your enclosed door. This will protect the end of the spring from going through the door since it is most likely fiberglass where the spring would...
    view full answer...
    Image 1 for
  • Installation of Trailer Ramp Springs RS16933LH and RS16933RH
    The left and right ramps springs # RS16933LH and # RS16933RH install on a shaft of 1-1/2-inches diameter. The width of the coil is 2-1/2-inches and the overall length of each spring is 11-inches. You can refer to the linked videos and to the linked photo from a customer that shows how these springs need to be installed on the shaft. The springs may not always have a color indicated but the photo shows which goes on which side.
    view full answer...
    Image 1 for
  • What is Actual Torque Rating for Redline Ramps Springs # RS16933LH and # RS16933RH
    The Redline Ramp Spring you referenced, part # RS16933LH, and the matching right-hand spring, part # RS16933RH, are intended primarily for use on equipment trailers, such as those used to transport a skid loader for example, not for utility-type trailers. These springs have an inside coil diameter of approximately 1-1/2-inches (and are intended for a 1-1/2-inch shaft). The wire diameter as measured with a digital caliper is 0.465 inches. I checked the Redline catalog and with my contact...
    view full answer...

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Info for this part was:

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