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Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center

Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center

Item # APT1
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Trailer Leaf Spring Suspension
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Trailer Leaf Spring Suspension APT1 - Hangers,Suspension Kits - Redline
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Leaf-spring mounting kit includes 2-1/2" tall front hangers, 5-7/16" tall center hangers, 2-1/2" tall rear hangers and necessary hardware. Equalizers are 8" long. Components for mounting axle to springs sold separately. Lowest Prices for the best trailer leaf spring suspension from Redline. Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center part number APT1 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (5)
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Redline Trailer Leaf Spring Suspension - APT1

  • Hangers
  • Suspension Kits
  • Spring Mounting Hardware
  • Double Eye Springs
  • Tandem Axle
  • Redline

Leaf-spring mounting kit includes 2-1/2" tall front hangers, 5-7/16" tall center hangers, 2-1/2" tall rear hangers and necessary hardware. Equalizers are 8" long. Components for mounting axle to springs sold separately.


Features:

  • Attaches 4 leaf springs (sold separately) to your trailer frame
    • Use table below to determine hanger location based on type of leaf springs
  • Achieves 4" or 4-1/2" clearance between trailer frame and axle, depending on axle size
  • Includes:
    • (4) 2-1/2" Tall front and rear hangers (115918)
    • (2) 5-7/16" Tall center hangers with 3/4" bolt holes (115919)
    • (2) 8" Long straight equalizers (TREQR83)
      • 3/4" Diameter center hole for mounting to hanger
      • 9/16" Diameter end holes for attaching to springs
    • (8) 2-5/8" Long shackle straps (115052)
    • (12) 3" Long x 9/16" diameter shackle bolts (9163B)
    • (12) 9/16" Diameter locknuts (916DLN)
    • (2) 3-1/2" Long x 3/4" diameter wet equalizer bolts (126A1LN)
    • (2) 3/4" Diameter castle nuts (165093)
    • (2) 2-1/4" Long cotter pins (165649)
    • (2) 1/8" MPT grease zerks (1610)
  • Designed for use on trailers with tandem, 2,000-lb to 7,000-lb axles
  • Does not include components for mounting axle to springs



Hanger Locations for Tandem Axle

Leaf SpringsA - Distance Between Front and Center HangersB - Distance Between Center and Rear HangersC - Distance Between U-BoltsD - Distance Between Center of Axle and Trailer FrameAxle Diameter
SP-169275 (1020)24-3/4"24-3/4"29-1/2"4-1/2"1-3/4"
(typical 2,000-lb trailer axle)
SP-219275 (PR722)
SP-220275 (PR3)
SP-218275 (PR4)
SP-212275 (PR4B)
SP-111275 (PR5)
SP-198275 (PR6)
29-1/2"29-1/2"34"4"2-3/8"
(typical 3,500-lb trailer axle)


APT1 Tandem Axle Hanger Kit - 1.75" Double Eye Springs - 2,000 lbs to 7,000 lbs





Video of Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center

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




Video Transcript for Redline Trailer Suspension - Leaf Spring Suspension - APT1 Review

Today, we're going to be taking a look at the tandem-axle trailer hanger kit for double-eye springs. The leaf spring mounting kit includes your equalizers, front, center, and rear hangers, and it's going to come with all the necessary hardware for the installation. Now, components for mounting the axle to the springs are sold separately. This kit is designed for use on trailers with tandem 2,000-pound to 7,000-pound axles. This kit would be great for building a new trailer, rebuilding an old trailer, repairing or upgrading your trailer's suspension system. The hangers and the shackles straps are made from a durable steel construction.

The hangers are designed to be a weld on installation. On the shorter hangers here, each one's going to have two holes on the top. Those are designed for spot welds. This kit's going to attach four leaf springs to your trailer's frame. Now, there is a helpful table located at etrailer.com on this product's product page.

That's going to help determine the hanger location based on the type of leaf springs being used. This kit is going to achieve 4-inch or 4 1/2-inches of clearance between the trailer frame and the axle. That's going to be dependent on the axle's size. We just want to go over the components that are included with this kit. You're going to get four 2 1/2-inch tall hangers, two act as front hangers, the other two act as rear hangers. The 2 1/2-inch measurement comes from the center of the 9/16-inch diameter hole to the top of the hanger.

You're also going to get two 5 7/16-inch tall center hangers. These are going to have the 3/4-inch holes on it. Again, the 5 7/16-inch measurement is going to come from the center of that hole to the top of the hanger, 5 7/16-inch. You're going to get your two 8-inch long equalizers. These are going to have the 3/4-inch diameter center hole, and 9/16-inch diameter end holes.

The 8-inch measurement comes from the center of one hole, outer hole, to the center of the other outer hole. Center on center, those are separated by 8-inches. You're going to get eight 2 5/8-inch long shackle straps. The 2 5/8-inch measurement is from the center of this hole to the center of that hole. You're going to get eight of those. You're going to get 12 3-inch long by 9/16-inch diameter shackle bolts. You're going to get 12 9/16-inch diameter locknuts. You're going to get two 3 1/2-inch long by 3/4-inch diameter wet equalizer bolts. You're going to get the appropriate 3/4-inch castle nuts that go with it, and you're going to get the 2 1/4-inch long cotter pins, and you're going to get the two 1/8-inch NPT grease zerks, allow for easy maintenancing 00:02:51. Now, the center hangers, again, are going to get welded to the trailer frame. All the hangers get welded to the trailer frame. The center hangers suspend the equalizers from the trailer frame. That's why they have that big opening right there, it matches up with the center opening there on the equalizer. It comes with the appropriate hardware to get that connected and attached. Then, each end of the equalizers connects to one end of the leaf springs with the included hardware and shackle straps. Then the other end of the leaf springs connect directly to the front and rear hangers with the included hardware. That's going to do it for today's look at the tandem-axle trailer hanger kit for double-eye springs.


Customer Reviews

Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center - APT1

Average Customer Rating:  5.0 out of 5 stars   (5 Customer Reviews)

Leaf-spring mounting kit includes 2-1/2" tall front hangers, 5-7/16" tall center hangers, 2-1/2" tall rear hangers and necessary hardware. Equalizers are 8" long. Components for mounting axle to springs sold separately.

- APT1
by:

Wondered about the order. After seeing your notification on delivery, had to go figure out where they had placed it. Was placed in the cab of the truck. Not a problem, just hadn't been in it for two weeks, and since I am blind in one eye and can't see out of the other, didn't see the delivery sticker on truck window. Everything appears to be in order. Will put new parts on trailer next week. Oh, this is a two axle, two horse trailer. Thanks David T. 159922



- APT1
by:

I am completely satisfied dealing with this company; best price, quality merchandise and prompt delivery. I would trust this company with my business, my wife, my whiskey and my money. 61999



- APT1
by:

Perfect replacement. Everything needed was included 573901



- APT1
by:

I am impressed with the quality and the low price. I talked to some of the local trailer sales people about the same parts and they could not even come close, saying the price from etrailer was less than they could buy the for. The delivery was quick. The parts are heavy duty steel and complete with everything I need. I would not hesitate to purchase from these people again. 283203



- APT1
by:

Super service and shipping. Part of shipment was lost by UPS and Etrailer made good and shipped me replacement before UPS even completed their review. Great folks. Thank you 159448


5
5

Ask the Experts about this Redline Trailer Leaf Spring Suspension

  • Placement of Front and Rear Hangers When Building 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 17 feet, then the center-line location...
    view full answer...
  • Why Do Suspension Hanger Kits Have Different Height Hangers
    The varying heights of the hangers is all designed so that you end up with the leaf springs as level as possible and still end up a desired distance away from the trailer frame. It may seem odd, but the center hanger will stick down further because the shackle straps that attach to the equalizers make up for the height difference. The equalizer is there so there is movement between the axles going over bumps to help smooth things out. The # APT1 uses a very flat equalizer so to make...
    view full answer...
  • How to Determine Trailer Leaf Spring Hanger Spacing
    You can refer to the linked articles on trailer axle spacing and leaf spring suspensions to help you determine where to position your spring hangers on your tandem axle trailer build. Hanger spacing depends on axle placement and axle placement should be determined based on having the trailer's tongue weight in the appropriate 10- to 15-% range. As you work out the design for the trailer, it is best to have the layout of the trailer finalized before placing the axles. This will ensure...
    view full answer...
  • Does it Matter Which Way a Double-Eye Trailer Leaf Spring Faces
    If they are double-eye leaf springs, it should not matter which way they are facing. But if they are slipper springs, the eye end is at the front and the slipper is at the back. The springs that we carry are not marked as to which end is front and I have seen them either way on a trailer. I have included some links to suspension FAQs for you.
    view full answer...
  • Are the Bushings Included in the APT1 Tandem-Axle Hanger Kit for Double-Eye Springs?
    The bushings on the 2 long equalizers are included in the # APT1 kit, but the rest of the bushings will typically come included with the leaf springs that are not included in this kit. Which ones you will need to purchase would depend on the diameter sized hole in your leaf spring, if it does not already accommodate the 3/4 inch diameter of the bolts included into this kit. I have linked our bushings as well as the bushing that has a 3/4 inner diameter to this page for your convenience.
    view full answer...
  • Individual Parts for Trailer Suspension Hanger Kit APT1 without the Hangers
    You can get the parts in hanger kit # APT1 separately but not as a kit minus the hangers. The equalizer is # TREQR83. For shackle straps you will need 8 of # 115052. For shackle bolts and nuts you would need 12 of # 166081. For the 3/4 inch wet bolts, pins, nuts, and grease fittings you would need 2 of # 126A1.
    view full answer...
  • Trailer Suspension Hanger Kit Spacing for a Tandem Axle Trailer
    I would need to know the axle capacities to be sure but I can venture an educated guess. The only tandem axle double-eye leaf spring hanger kit we have that includes 8 inch equalizers is # APT1. With this kit, the center of the forward hanger to the center of the rear hanger would be 29-1/2 inches. It is the same from the center hanger to the rear hanger on center. That would make the center to center distance between the 2 axles 34 inches. I have included a picture showing the measurements...
    view full answer...
  • Parts Needed to Replace Leaf Springs, Shackles and Hangers on a Tandem Axle Trailer with 3 Inch Axle
    The # SP-218275 springs are not designed for use with a 3 inch Dexter axle. A 3 inch axle is rated for at least 6,000 pounds so you would need to go with the # SP-198275, 6-Leaf Double-Eye Spring. The # SP-198275 spring has a 24-7/8 inch length and will have the same axle spacing, 34 inches, as the # SP-218275 spring that you referred to. You should check your current axle spacing or wheel and tire size to be sure the 34 inch spacing will provide clearance to mount the tires on your...
    view full answer...
  • Spring Hanger Position for Tandem Axle Trailer with 6000 lb Axles
    To determine the location for the axles 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 for the equalizer...
    view full answer...
  • Hanger Distance for Installing 25-1/2 inch Leaf Springs with Hanger Kit # APT8
    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 10 feet, then the center-line location...
    view full answer...
  • Placement of Front and Rear Hangers When Building 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 10 feet, then the center-line location...
    view full answer...
  • 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 10 feet, then the center-line location...
    view full answer...
  • Will Trailer Suspension Hanger Kit # APT5 Fit a Trailer with 2-3/8 Inch Diameter Axle
    You can use the Tandem-Axle Trailer Hanger Kit # APT5 for your trailer with the 2-3/8 inch axle. A 2-3/8 inch diameter axle is typically found on 3,500 pound axles which is within the range of this kit (2,000 to 7,000 pound axles). The measurements in the chart on the page can be used as a guide. A better option for a 2-3/8 inch axle is kit # APT3, # AP233-H248, or # APT1. It all depends on the axle spacing, spring measurements, and equalizer length.
    view full answer...
  • What Is The Proper Hanger Spacing For A 3 Leaf 1,750 lb Capacity Leaf Sping
    The spacing of leaf springs varies depending on how many axles are on your trailer and the position of the spring. For a 3 leaf, 1,750 lb spring like part # PR3 the hanger specifications in the Redline Trailer Supplies Catalog are as follows: Single axle - 25-3/4 inches Tandem axle - A=29-1/2 - B=29-1/2 Triple axle - A=29-1/2 - B=34 - C=29-1/2 The recommended hanger kit for a single axle trailer is Single Axle Trailer Hanger Kit, part # APS1, or part # APS4. For tandem axle, the...
    view full answer...
  • Tandem Axle Trailer Suspension Hanger Kit with 8 Inch Long Straight Equalizers
    The tandem axle version of trailer suspension hanger kit # APTT1 is actually # APT1. I have also included a link to all of the tandem axle kits we have.
    view full answer...
  • Replacement Suspension and Brake Parts for a 1973 Bara LS Trailer
    Thank you for all of the info! Based on what you told me and the pictures you sent in separately I believe I know what you need. The brakes you need are the Electric Trailer Brake Kit # AKEBRK-35-SA which measure 10" x 2-1/4" and have a 4 bolt flange mounting pattern. I also recommend replacing your hub and drum assemblies as well. For this the Trailer Hub and Drum Assembly # AKHD-545-35-K should work but you will want to verify that your trailer currently uses inner bearing # L68149...
    view full answer...

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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Alexander C

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