See what our Experts say about this Redline Trailer Suspension Parts

• Trailer Suspension Hanger Kit with the Most Lift for Tire Clearance Under the Trailer Bed
  The # APT4 Tandem-Axle Hanger Kit will provide about 4 inches of clearance from the center of the trailer axle to the bottom of the trailer frame, with no load on the axle. This is assuming that your axle tube is 3 inches diameter. If your axle tube is smaller the height will be sightly less. The curve of the springs you select will have some affect also. I would recommend that you go with the APT5 hanger kit because all of the hangers are the same height and it will make it easier to...
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• Replacement Hanger Kit and EZ Flex Equalizers for Trailer with Tandem Dexter EZ Flex
  Hey Fred, the closest kit we have to the hangers you have now would be the part # APT4 which comes with hangers that are 3-1/4 inch front and rear and 5-7/16 inch for center. Then for EZ Flex equalizers to swap out what comes with that you'd want the part # K71-654-00. Then for wet bolts you'd want the part # 126B2 and you'd be set.
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• Correct Hanger Spacing for the Tandem-Axle Trailer Hanger Kit Part # APT4
  The position of the axle should dictate the position of the springs and hangers not the other way around. With that being said, in order to determine proper placement of the hangers you will want to take the the distance between the two eye holes on the leaf spring which on part # e54SR is 25-1/8". Add that to half of the length of the equalizer from the center of the two lower bolt boles which for the one included in part # APT4 is 3-1/8". You would then need to subtract 1/2" for the shackle...
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• How to Find the Correct Replacement Equalizer
  The Tandem-Axle Trailer Hanger Kit for Double Eye Springs # APT5 may have the correct equalizer but you will need to measure the current equalizer to find out. The length from the center of the left-most eye to the center of the right-most eye of your equalizer needs to be the same as the 7-3/4 inch measurement in this kit. Since you said the shackles are hitting the frame I recommend using a kit with a center hanger that is longer than the 3-3/4 inch hanger that comes with Kit # APT5....
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• Options for Raising Suspension of a Horse Trailer
  The most common way to lift a trailer is to move the axles below the leaf springs. The diameter of your trailer axle will determine the size of the parts that you will need to order. If your axle is 3 inches diameter, the Dexter Trailer Springs Over-Under Conversion Kit, # K71-385-00, would be a great choice and if your axle is 2-3/8 inch diameter you could use the Over-Under Kit, # K71-384-00. These kits can be installed without welding but the manufacturer strongly recommends having...
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• How to Add a Lift to a Toy Hauler Trailer for Better Ground Clearance
  You can lift your trailer by taking the axles of the trailer and moving them below the leaf springs. Depending on the amount of leaves on your leaf springs this should give you about a 4-6 inch lift. The diameter of your trailer axle will determine the size of the parts that you will need to order. If your axle is 3 inches diameter, the Dexter Trailer Springs Over-Under Conversion Kit, # K71-385-00, would be a great choice and if your axle is 2-3/8 inch diameter you could use the Over-Under...
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• Distance Between Hangers with 26 Inch Leaf Springs
  We don't carry the MR4 leaf springs but based on my research they look like they are 26 inch double-eye springs like part # e94SR. For springs of this length and the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs # APT4 the hangers are going to be spaced 30-1/4 inches apart. I have added a link to a video review of the hanger kit as well as a couple help articles on trailer suspension which I recommend checking out.
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• Troubleshooting Rear Tires Wearing on Inside for Dual Axle 5th Wheel Trailer
  Thank you for all of that information. From everything that you described it sounds like you are overloading your rear axle. Even though your axles are rated for 8K each and you only have 12,420 lbs on your axles, if your rear tires are wearing on the inside tread then you have too much weight over the rear axle and you need to adjust cargo around in your 2019 Grand Design 367 BHS Reflection 41. Axles naturally have an arced shape and when they are weighed down correctly they straighten...
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• Replacing Trailer Leaf Spring Hangers
  Thank you for including your diagram, but unfortunately some of the information is not legible. In any case if you are replacing existing parts with different ones you will want to mock up the suspension set-up by first just tack welding the hangers. This will enable you to see if the whole system fits together and if you need to select a new equalizer. The linked diagram provides general axle placement guidelines for new construction. Generally, you want the eye of your spring to be...
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• Raising the Height of a Travel Trailer that Rides Close to the Ground
  If the leaf spring stack on your travel trailer is currently mounted to the bottom of the axle, there is an over-under conversion kit that you could use to gain a few more inches of height. However, this will change the center of gravity on the trailer and can lead to an increased chance of trailer sway. For 3 inch round axles you could use # K71-385-00. And for 2-3/8 inch round axles use # K71-384-00. You should not have to do any welding to use these kits. You would not want to flip...
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• How Much Space Should be Between the Top of the Axles and the Bottom of a Boat Trailer
  Normally when using hanger kit # AP233-H248 with spring # e66SR the distance from the bottom of the frame to the center of the axles is going to be approximately 4-1/2 inches. Subtract half the width of the frame then to the top of the axles that would be 3-5/16 inches. Two inches might work out fine depending on how far the suspension travels but more height would likely be needed considering the heavier load. Hanger kit # APT4 would provide more height since it has taller hangers than...
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• Recommended Hanger Spacing for 24-7/8 Inch Long Leaf Spring with APT4 or APT3HD Hanger Kit
  Based on my research, when using the Universal Group Leaf Springs # SP-222275 that has a spring eye length of 24-7/8 inches with either the Redline Tandem Axle Hanger Kit # APT4 or # APT3HD, you will want a distance of 29-1/2 inches between the hangers on your trailer. Both hanger kits you referenced include everything needed to attach 4 leaf springs to your trailer frame. I have included a couple short video demonstrations on these kits along with an article on positioning a trailer axle...
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• Correct Hanger Spacing For The APT4 Kit Using 25-1/8 Long Leaf Springs
  The hanger spacing for the # APT4 with 25-1/8" leaf springs is 27-3/4" on center. I have attached a drawing for your reference.
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• What Is The Tallest Leaf Spring Hanger Kit We Offer?
  The tallest Leaf Spring Hanger Kit we offer is the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front/Rear, 5-7/16" Center # APT4 which uses 3-1/4" tall front and rear hangers, and 5-7/16" center hangers. The included equalizers are 6-1/4" long, and the included shackles are 2-5/8" long. The hangers will need to be welded to the frame of your trailer by a qualified welder. If you can tell me what the weight rating of your axle is I would be happy to recommend the correct...
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• Getting More Ground Clearance on a 2012 Lance 1575 Travel Trailer or Other Trailers
  I have a couple of options that will give you more ground clearance depending on how your 2012 Lance travel trailer is set up. First, if the trailer uses double-eye leaf spring suspension AND the axles are on top of the leaf spring stack, AND if you have a 2-3/8 inch diameter round axle, you can use over/under conversion kit # K71-384-00 to move the leaf spring stack to the tops of the axles. For a 3 inch diameter axle use # K71-385-00. If the trailer does not fit the criteria above then...
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• Way To Raise Trailer Suspension When Axles are Under Leaf Springs
  If your axles are currently under the leaf springs then an over-under kit would not be the correct product to use as it would not actually raise your trailer. It would lower it. If you cannot use an over/under conversion kit then the only other way to raise the height of the trailer is to have the old suspension hangers cut off and new, taller ones welded on by a qualified professional welder. I have included a link to the hanger main page for you. You can also try raising the pin box...
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• Is It Possible to Move Square Axles Below Leaf Springs
  Based on the picture you submitted that shows a square axle welded to a mount which is then welded to a leaf spring you would need to have someone qualified use a cutting torch to remove the mount from the spring so that you could then use a u-bolt style of mounting kit to attach the spring on top of the axle. To do this you will need to know the dimensions of the axle. We have kits for square axles that range from 1-1/2 inch square axles up to 2 inch axles. Once you determine the size...
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• How to Determine where to Place Axles on a 17 Foot Car Trailer or Any Trailer
  Placement of the axles depends on several factors and there is a formula that you can follow to determine the best placement of the axles. Take a look at the picture I have included which explains how to determine where axles should be placed. Once you have the axle locations determined you can look at what hanger kit will work best for you. I have included a link to the options for you.
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• Recommended Suspension Components For Double-Eye Springs On Tandem Trailer
  We do not have any kits that have all the components with the dimensions you asked for. You can go a couple ways. You can choose to go with the kit you asked about, part # APT4, and then choose different shackle straps. You will need a quantity of 8 shackle straps. We do not have 3 inch shackle straps available. We do have part # TRSL313, that measures 3-1/8 inches center to center. The overall length is 4-3/8 inches. Or you can order the following components separately (2) 6-1/4 inch...
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• Replacement Suspension Kit For Tandem Axle 1 3/4 Springs With 7-3/4 x 2-7/8 Inch Equalizers
  In order to retain your current suspension geometry, you'll need to use an equalizer of the same length and height as the 7-3/4 x 2-7/8 equalizer you currently have. The Dexter Axle # K71-449-00 offers equalizers that are the same width and height as what you have now. The only difference is that the shackle links are a tiny bit shorter, at 2-1/4 inches versus the 2-1/2 you currently have. This difference is very small and won't be enough to have a negative effect on your suspension geometry. Thanks...
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• Options to Level a Fifth Wheel Trailer that is Being Towed by a Taller Truck
  The easiest solution would be if you could lower the head of your fifth wheel hitch, or raise the pin box of your trailer. Either of these options should allow your trailer to sit more level. You would want to make sure you have between 4-6 inches from the overhang of your trailer to the bedrails though. Another option you have would be to move your axles to below the leaf springs. This is the most common way to lift a fifth wheel trailer to allow the trailer to be towed level if the hitch...
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• Recommendations for Lifting Travel Trailer About 3 Inches
  To raise your travel trailer about 3 inches, your best option is to use an over under kit like # K71-384-00 for 2-3/8 inch diameter axle or # K71-385-00 for a 3 inch axle. These kits will convert your axle and suspension so the axle will be under the leaf springs so it will raise your trailer the diameter of your axle plus the height of your leaf spring stack. Another option is the Lippert Components Center Point by Trailair Air-Ride Suspension Upgrade - Tandem Axle # LC1565391 which...
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• Is Welding Required to Install the Tandem-Axle Trailer Hanger Kit # APT4 on a Trailer
  Yes, you will need to have a qualified welder weld on the hangers of the Tandem-Axle Trailer Hanger Kit # APT4 on your trailer.
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• How To Raise A Tandem Axle Trailer 3 Inches
  The longest shackle strap we offer is part # TRSL313 which measures 3-1/8" long center to center. In order to replace all of these on a tandem axle trailer you would need eight of them. However, as previously mentioned this will not raise the trailer. If you were to install a longer shackle strap than what the leaf springs and equalizers were designed to be used with it could then create binding issues and potentially cause the leaf springs to make contact with the bottom of the trailer....
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