Kit includes 3-1/4" tall front hangers, 1-1/2" tall rear hangers, 3-1/8" shackle straps and hardware for mounting springs to your 2,000-lb to 7,000-lb, single-axle trailer frame. Components for mounting axle to springs sold separately. Lowest Prices for the best Trailer Suspension from Redline. Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/2" Rear part number APS4 can be ordered online at or call 800-298-8924 for expert service.
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Trailer Suspension > Suspension Kit > For Double Eye Springs > For 1-3/4 Inch Wide Spring > Single Axle > Redline

Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/2" Rear

Redline Trailer Suspension

(13 reviews)

Code:   APS4



Shipping Special

Shipping Weight: 8.52 pounds


Redline Trailer Suspension - APS4

Kit includes 3-1/4" tall front hangers, 1-1/2" tall rear hangers, 3-1/8" shackle straps and hardware for mounting springs to your 2,000-lb to 7,000-lb, single-axle trailer frame. Components for mounting axle to springs sold separately.


  • Attaches 2 leaf springs (sold separately) to your trailer frame
    • Use table below to determine hanger location based on type of leaf springs
  • Achieves 5" or 5-1/2" clearance between trailer frame and axle, depending on axle size
  • Includes:
    • (2) 3-1/4" Tall front hangers (28-5)
    • (2) 1-1/2" Tall rear hangers without bushings (93003-3X)
    • (4) 3-1/8" Long shackle straps (115208)
    • (6) 3" Long x 9/16" diameter shackle bolts (9163B)
    • (6) 9/16" Diameter locknuts (916DLN)
  • Designed for use on trailers with single, 2,000-lb to 7,000-lb axles
  • Does not include components for mounting axle to springs

Hanger Locations for Single Axle

Leaf SpringsA - Distance Between HangersB - Distance Between Center of Axle and Trailer FrameAxle Diameter
(typical 2,000-lb trailer axle)
PR722, PR3, PR4, PR4B, PR5, PR624-7/8"5"2-3/8"
(typical 3,500-lb trailer axle)

Note: The above table provides an indication of where the included hangers can be mounted on your trailer. The distance between the hangers may vary depending on your specific application. Be sure to verify proper positioning before welding.

APS4 Single Axle Hanger Kit - 1.75" Double Eye Springs - 2,000 lbs to 7,000 lbs

Customer Reviews

Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front, 1-1/2" Rear - APS4

Average Customer Rating:  4.9 out of 5 stars   (13 Customer Reviews)

Kit includes 3-1/4" tall front hangers, 1-1/2" tall rear hangers, 3-1/8" shackle straps and hardware for mounting springs to your 2,000-lb to 7,000-lb, single-axle trailer frame. Components for mounting axle to springs sold separately.

- APS4

by: Jay R.06/29/2013

Product was shipped fast, arrived within a couple of days, and was packaged nicely. Not just thrown in a box. Someone took the time to wrap every piece. The quality of the product was so much beeyer then I was expecting, with the prices that I got. Will be ordering from this website in the future and so will everyone I talk to. 86756

- APS4

by: eric l04/24/2014


- APS4

by: Isaac H.11/23/2011

I order some suspension parts to rebuild my trailer and the service provided by was outstanding! They kept me posted on my order until it arrivied - 2-days early! I'll be back for all my future trailer needs! 27319

- APS4

by: Jim G.08/29/2011

As advertised after just opening the box for inspection.... I would have hoped for bolts that were drilled and could be lubed... I guess that's asking too much.... 23038

- APS4

by: Robert smith08/01/2011

Product well described and fit exactly.My trailer is back on the road because of E trailer.Ease of use and quick shipping is great. 20814

- APS4

by: Kellen Hood12/06/2013

Easy to use and added 2 inches to my trailer clearance. Looks great and is very robust! 109368

- APS4

by: William S.08/21/2011

Quick delivery & parts worked well. Very happy with purchase. 22382

- APS4

by: Pat P.06/14/2011

Item was exactly as described, the quality is excellent. 16956

- APS4

by: Dan12/05/2013

Smooth transaction with good communicat ion 109301

- APS4

by: steve b05/31/2013

everything needed for spring install 82734

- APS4

by: rick03/13/2013

Great hanger kit, made well 70553

- APS4

by: Bill11/28/2014

Product was as described 162702

- APS4

by: willy07/23/2012

well made product 48942


Ask the Experts about this Redline Trailer Suspension
Do you have a question about this Trailer Suspension?

  • Trailer Spring Kit # 2-1020 Recommendation for an Old Boat Trailer Converted to a ATV Trailer
  • It sounds like you may have a vehicle leaf spring on your old boat trailer as we do not carry any leaf springs that are that length. The longest one we have is 27 inches long and is designed for 3,000 lb axles. That spring is the Redline Leaf Spring # PR427. The leaf spring that would closely match the axle capacity of your trailer would be the Redline Trailer Suspension # 1020. For a kit I would recommend a 3-Leaf, Double-Eye Spring Kit for 2,000-lb Trailer Axles # 2-1020. You...
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  • How to Raise the Height of a Boat Trailer to Avoid Scraping on Inclines
  • What I recommend, if the trailer has round axles, is an over-under conversion kit. For 3 inch round axles use # K71-385-00 and for 2-3/8 inch round axles use # K71-384-00. This of course will only work if the leaf springs are mounted to the bottom of the trailer now. What this kit does is allow you to put the springs on top of he axle without flipping the axle or welding. Otherwise what you could do is use taller hangers. All of the hangers would have to be raised the same amount. So...
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  • Hanger Kit # APS4 Distance Recommendation for Use with Double Eye Spring # PR5
  • You have everything correct in your setup. You have all of the right parts in the right places and you have all the right measurements for everything. The 5-Leaf Double-Eye Spring, part # PR5, is the right spring to use with the Single-Axle Trailer Hanger Kit for Double-Eye Springs, part # APS4, that you have. The reason the shackle angles toward the the axle is because the spring length is 25-1/4 inches long and the correct distance between the hangers is 25-3/4 inches. Since the spring...
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  • How to Mount Redline Single-Axle Trailer Hanger Kit Part # APS4 To Trailer Frame
  • I contacted our representative at Redline and he informed me that the Single-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4 Front, 1-1/2 Rear, part # APS4, must be welded to the trailer frame. He informed me that there should be a hole to make a Button Weld. I would recommend having a trailer professional install part # APS4.
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  • 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...
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  • Replacing a Double-Eye Leaf Spring that is 53 Inches Long on an Old Utility Trailer
  • Since you want to go to much shorter springs it will require welding on new hangers just so you are aware. The PR4B spring you reference can be used with many hanger kits. The one that is going to give you the most clearance is # APS4 at 5 inches. At this time we do not have u-bolt plates or u-bolts for a 3 inch square axle. If you already have these items and they are in good shape you could re-use them. The spring you currently have might be an automotive spring which means this might...
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  • How Much Clearance Between the Top of Axle and Bottom of Trailer using Leaf Spring PRB4
  • A lot depends on the hanger kit you are using. With the # PR4B spring and hanger kit # APS1 from the bottom of the trailer deck to the top of the axle should be approximately 2-3/4 inches. If you were using hanger kit # APS4 then it would be approximately 3-1/2 inches. You can use these measurements to determine where the top of the tire would be.
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  • What Should the Hanger Spacing be for 1020 Leaf Springs and Hanger Kit APS4
  • We have a handy chart on the product page that will show you the distance you will want the front and rear hangers to be when using kit # APS4. When using # 1020 springs the distance from the center of the front hanger to the center of the back hanger will need to be 20 inches.
    view full answer...

  • Recommended Options for Replacing Broken Leaf Springs on Homemade Trailer w/ 2 Inch Diameter Axle
  • Let me begin by saying that going with a higher rated leaf spring won't increase the load bearing capacity of your trailer. You'll still be limited by the capacity of your axle, spindles and tires. You mention a 2 inch axle, but 3500 lb axles (to match the PR4B spring you mentioned) are typically 2-3/8 inches in diameter, so your existing axle might not be substantial enough to achieve the 3500 lb capacity. You mentioned welding new shackles...I believe you meant spring hangers, is that...
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  • Are the Threads of the Shackle Bolts of the Single-Axle Trailer Hanger Kit Fine or Coarse
  • The threads of the shackle bolts included with the Single-Axle Trailer Hanger Kit # APS4 are fine and they include the correct matching locknuts.
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  • Hanger Placement with 3,500 lb Axle with Hanger Kit part # APS4 On Trailer with Axles Under Springs
  • Your axles being under the leaf springs will not change the hanger location recommendations listed for the Single Axle Hanger Kit part # APS4. You would want to have the hangers 25-3/4 apart measured on bolt center. However, since your axles are below the springs you would not need to have 5 inches between the center of the axle and the trailer frame.
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  • Hanger Spacing Recommendation for Leaf Spring # PR4
  • Based on the description of the springs you have it sounds like you have the 4-Leaf Spring part # PR4. This is a 4 leaf spring that measures 25-1/4 inches from eye to eye. I did some checking and the hanger kit you would want is the Single-Axle Trailer Hanger Kit # APS4. And the distance between the spring hanger centers should be 25-3/4 inches.
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  • Rear Hangers in Trailer Suspension Kit # APS4 Do Not have Bushings
  • The trailer suspension hanger kit # APS4 does include hangers that do not have bushings like you said. Adding bushing definitely would not hurt if they will fit. The bolts are 9/16 inch which is what the holes in the hangers accept. There likely isn't space for a bushing. The other issue is that there are no bushing we carry that have a 9/16 inch outer diameter (which would then require a smaller bolt). You will want to make sure the hangers without the bushings are well lubricated using...
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  • Leaf Spring Hanger Options for 8x8 Tilt-Bed Trailer
  • For the springs, I'd recommend the # 2-1020 kit which includes two 2K leaf springs, 2 u-bolts and 2 u-bolt plates to fasten the springs to the axle. The hanger kit you use will depend on how much space you want between the axle and the trailer frame. Hanger kit # APS1 provides between 4-1/4 to 4-1/2 inches of clearance. # APS3 would give between 4 and 4-1/2 inches of clearance. # APS4 is 5 to 5-1/2 inches and # APS5 is between 4-3/4 and 5-3/8 inches. We do stock a few off the shelf...
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Do you have a question about this Trailer Suspension?

Info for this part was:

Updated by:
Lindsey S

Expert Research:
Michael H

Expert Research:
Reno H

Expert Research:
Jameson C

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