4-Leaf Double-Eye Spring for 5,000-lb Trailer Axles - 25-1/4" Long

See what our Experts say about this Universal Group Trailer Leaf Spring Suspension

• Torque Rating Requirements for Installing Leaf Springs on a 7000 lb Tandem Axle Trailer
  The torque requirements for leaf spring u-bolts depend on the diameter of the u-bolts that are being used. If the gross weight of your tandem axle trailer is 7,000 lbs, then you likely have two 3,500 lb axles. Typically 1/2 inch diameter u-bolts are used with leaf springs for 3,500 lb axles and they have a torque rating of 45 ft/lbs to 70 ft/lbs. The shackle bolts do not require a specific torque rating because tightening the shackle bolts too much will squeeze the shackle straps against...
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• Which Orientation are Leaf Springs Installed In
  The 12-5/8 inch dimension from the spring eye to the cinch bolt of the # SP-218275 leaf spring (dimension C in the diagram) is symmetrical, so the spring could be mounted in either direction. Customarily, the end of the spring with the band wrapped around it is placed forward of the axle, closest to the front of the trailer, but it really makes no difference. On leaf springs that are asymmetrical, the shorter distance would be forward of the axle.
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• Recommended Spring Eye Diameter Bolt for 9/16 Inch Hole on my Boat Trailers Leaf Spring
  I would recommend getting the 9/16 inch diameter bolts for your leaf spring, because the diameter should match the bushing or bolt hole inner diameter. I have linked all the 9/16 inch bolts we have for your convenience, you will just need to select the length you are in need of.
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• Troubleshooting Trailer That Rocks Side to Side While Being Towed
  Is your trailer sitting as level as possible? It almost sounds like your trailer is sitting nose high based on the movement you described. You will want your trailer sitting as level as possible with at least 6 inches between the trailer overhang and bed rails of the truck. You can change the height of the nose of the trailer with the fifth wheel hitch head and the pin box height. Other than that check the conditions of the suspension components to make sure nothing is worn out and would...
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• How to Pick Out Replacement Leaf Spring for Jayco Fifth Wheel
  When replacing trailer leaf springs we strongly recommend you replace them in pairs. I would urge you to get a set of matching properly rated springs for your trailer as soon as possible. If you look on the frame of your trailer there should be a plate with the trailer VIN number and the axle capacities of the trailer. You will want to pick leaf springs that are as close to the axle capacity as possible. You will want to also measure the distance from eye to eye of your old leaf springs...
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• How to Select Replacement Leaf Springs for Tandem Axle Boat Trailer
  We can help you with replacement leaf springs for your tandem axle boat trailer. We recommend to replace the springs on both sides of the trailer axle, not just the one broken one, to avoid problems with the trailer tracking straight as you go down the road. If you click on the linked page you'll see our main page for trailer springs. Just click on the type you need, double-eye or slipper, and then on the axle weight rating. Usually there will be a sticker on your axle that tells you its...
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• Thickness of the Double Eye Leaf Springs PR4
  I went out to the warehouse and measured one of the # SP-218275 Double Eye Leaf Springs we have in stock. The spring pack is 1-9/16 inch thick, not including the centering bolt and nut. Each layer (or leaf) is approximately 3/8 inch thick.
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• Can Heavier Leaf Springs Be Used On Tandem-Axle Boat Trailer
  You can use heavier-duty leaf springs like part # SP-218275 on your tandem axle boat trailer. The dimensions of the springs are the same so you will have no problem installing the new springs.The ride may be a bit stiffer with the new springs but they will work just fine on your trailer. Putting heavier springs on your trailer will not increase the weight capacity for the trailer. Since you mentioned you are replacing the suspension I have attached some links to suspension components...
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• Leaf Spring U-Bolt and Electric Brake Backing Plate Bolt Torque Ratings
  You will first want to determine if your u-bolts on your leaf springs are 3/8 inch or 1/2 inch u-bolts. The torque for the u-bolts are a minimum of 30 ft-lb and a maximum of 40 ft-lb for 3/8 inch u-bolts or a minimum of 45 ft-lb and a maximum of 60 ft-lb for 1/2 inch u-bolts. The bolts used to secure the electric brake to the backing plate do not have a specific torque rating, but can be hand tightened until the split lock washer is flattened and then an additional 1/4 turn. I have included...
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• How To Determine Where to Place Axles on a Tandem Axle Trailer
  To determine the location for the front and rear hangers on your tandem axle trailer you will first need to make sure that you have the correct center point for your equalizer hanger. The center point of your equalizer hanger needs to be located where you will have 60 percent of the frame of the trailer in front of the center of the equalizer hanger and 40 percent behind the center of the equalizer hanger. For example, if the trailers frames length is 18 feet, then the center-line location...
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• Replacement Leaf Springs for Tandem Axle Trailer
  To determine the correct replacement springs there are a couple of things you will want to look at. First, you will need to know the axle capacity. This information should be on a sticker or plate on the trailer tongue or frame somewhere. If you cannot find this information it could be stamped on the axle somewhere. And if you cannot find it there then you could go by the axle diameter, if it is a round axle: 1,000-lb - 2,000-lb Axles: 1-1/2" - 1-3/4" diameter 3,500-lb Axles: 2-3/8" diameter...
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• How to Determine the Right Replacement Double-Eye Leaf Spring for a Golf Cart Trailer
  To choose replacement leaf springs you would have to go by the measurements of the old springs and the capacity of the axle (or individual spring). The # SP-218275 spring measures 25-1/4 inches from eye center to eye center. And it is rated for 2,400 pounds for a 4,800 pound axle. Springs should also be replaced in pairs. To measure a spring you will need to have the weight off of it. A worn spring will flatten out some so the measurements may not be exactly the same as a new spring. I...
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• Does Adding an Axle to a Trailer Double its Capacity
  The axle capacity for a trailer does double when you add a second one to a trailer. This does not mean the trailer has double the capacity since the frame of the trailer may have the capacity. A trailer's overall capacity is only as strong as it's weakest link. That could be the axles, tires, suspension, trailer frame, coupler, etc. The best way to pick out leaf springs is to pick a set that matches the capacity for the axles/trailer the best. If you have 3,500 lb axles you would want...
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• Should Trailer with Extended Axles be Returned to Stock Condition
  If it were my trailer and I didn't need the extra width I would put it back to the stock configuration. I would be afraid that the extensions would add too much stress and lead to excessive tire where, tracking and suspension problems, and possible failure. The other solution would be to set up the trailer properly for the extra width which would be more expensive and involve more work than just putting it back to stock.
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• Will Double-Eye Springs # PR4 Fit 2004 Cardinal Travel Trailer w/ Rockwell American 93103 Springs
  I made a call to my contact at Rockwell American and was able to obtain some information on the springs that are currently on your 2004 Cardinal travel trailer. Your current springs, 93103, have an axle capacity of 4,400 lbs, are 1-3/4 inch wide, and measure 25-1/4 inches from center eye to center eye so the 4-Leaf Double-Eye Spring, # SP-218275, will work for you. This spring is a very close match with the only difference being the slightly higher axle capacity at 4,800 lbs. I have attached...
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• Trailer Hanger Spacing and Installation for Trailer Fabrication
  Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are based on our preassembled kits. Once you have all of these parts, you will want to mock up the hanger spacing before permanently attaching the hangers or torqueing down the bolts. A good spacing to start with is 29-1/2 inches between the front and center hanger and 29-1/2 inches between the rear and center hanger. Remember,...
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• Can Changing Trailer Springs to Higher Rating Cause Axle Damage or Increase Trailer Weight Rating
  Installing heavier springs in your trailer's suspension will not directly cause any damage to your axle. But also note that changing your trailer's leaf spring suspension from 3500-lb rated springs to 4800-lb rated springs will not necessarily increase the trailer's weight capacity. Springs are one part of the entire suspension system and changing one item is no guarantee of increased capacity. All of the trailer's parts - its tires, wheels, hubs, axles, suspension and frame - all have...
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• Why Does a Shorter Leaf Spring have a Higher Capacity than an Identical Longer Spring
  A lot goes into giving something its weight capacity. The springs have been designed and tested for 4,800 pound trailer axles, 2,400 pounds per spring. It is actually more difficult to flex a shorter piece of steel than a longer one so it makes sense that a shorter spring would have a higher capacity. As long as you can properly install the springs and they are appropriately rated for the trailer then it wouldn't be a problem.
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• Leaf Spring Recommendation for a Trailer to Stiffen Up Suspension that has 3,500 lb Axles
  Regardless of the amount of leaves a leaf spring has if the capacity is the same between two of them they would both flex and bottom out the same. I would recommend you have your trailer and boat weighed so that you know whether or not you are overloading the trailer/leaf springs. You should note that going to a heavier spring won't necessarily give your trailer a higher weight rating, just a higher spring rating. For a higher rated spring you would want the part # SP-218275 as it has...
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• Will Changing Leaf Springs and Equalizers Affect Alignment of Trailer
  If you are replacing just the leaf springs and equalizers the alignment shouldn't change at all. If you were also changing the hangers the potential for the alignment to change is greater since that's what the springs and equalizers mount to. Either way if you are concerned about the alignment changing you can take the trailer to an alignment shop and they'll be able to check and see if any adjustments are needed.
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• What is Spring Rate of Trailer Leaf Spring # SP-218275
  So trailer leaf springs like the part # SP-218275 typically only flex about 1-1/2 inch when at capacity. So that means it takes 2,500 lbs for this spring to move 1-1/2 inches and spring rate is weight required to move spring 1 inch. That means it takes 1,675 lbs to move the spring 1 inch.
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• How to Choose Correctly Rated Trailer Leaf Springs for Single Axle
  Ideally the leaf springs on your trailer simply match or just slightly exceed the weight capacity of the axle. Leaf springs that are rated too high compared to the trailer's weight can lead to a rougher ride on the road. The axle capacity should be stamped right on the unit itself or it may be on the trailer's main information tag located on the frame up towards the coupler. If your trailer typically has a loaded weight of around 4,500 pounds though, there's a good chance that the axle...
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• Are the Leaf Springs the Same as in the Photos
  Yes, the 4-Leaf Double-Eye Spring part # SP-218275 that you see in the photos on the product page will be the exact same as the leaf spring you receive in the mail. This leaf spring is rated at 2,500 lbs and measures 25-1/4" from the center of the spring eye to the center of the spring eye. It comes with nylon bushings and has a solid steel construction. I have attached a review video for you as well.
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• When Determining Axle Location on Trailer is Trailer Tongue Length Factored into Location
  When determining axle location on a trailer and using the 60/40 guideline you do include the length of the trailer that includes the tounge and coupler length. The center point of your equalizer hanger needs to be located where you will have 60 percent of the frame of the trailer in front of the center of the equalizer hanger and 40 percent behind the center of the equalizer hanger. For example, if the trailers frames length is 18 feet, then the center-line location for the equalizer...
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