1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Leaf Springs
  4. Springs
  5. Slipper Springs - 1-3/4 Inch
  6. 24-5/8 Inch Long
2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long

2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long

Item # SP-177275
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Trailer Leaf Spring Suspension
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Universal Group Springs - SP-177275
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Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter. Lowest Prices for the best trailer leaf spring suspension from Universal Group. 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long part number SP-177275 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (121)
  • Q & A (47)
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Universal Group Trailer Leaf Spring Suspension - SP-177275

  • Leaf Springs
  • Springs
  • Slipper Springs - 1-3/4 Inch
  • 24-5/8 Inch Long
  • 1000 lbs
  • Universal Group

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.


Features:

  • Leaf spring acts as part of your trailer's suspension system
    • Provides attachment point for your trailer's axle
  • Multiple leaves allow flexibility to absorb road shock
    • Allows for a smooth ride
    • Reduces wear and tear on trailer
    • Ensures level ride on bumpy and uneven surfaces
  • Sturdy steel construction
  • Nylon bushing included
  • Pre-mounted hangers or aftermarket hanger kit (sold separately) required for installation
    • Eye of spring attaches to hanger mounted on trailer frame
    • Slipper end slides into hanger or equalizer


Specs:

  • Quantity: 1 leaf spring
  • Spring capacity: 500 lbs
  • Axle capacity: 1,000 lbs
  • Length from center of spring eye to end of spring: 24-5/8"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 11/16"
  • Leaf thickness: 1/4"
  • Number of leaves: 2
  • Additional dimensions: see table


Radius End Slipper Spring

Part NumberABCDEF
SP-17727511-3/16"22-11/16"24-5/8"12"14-1/2"3-1/2"


Note: To ensure proper axle alignment and suspension performance, leaf springs should always be replaced in pairs.


Leaf springs are an integral part of your trailer suspension system. The leaf springs provide the attachment points for your trailer's axle, suspending it from the frame of your trailer. Each spring flexes to absorb road shock as you travel, allowing the axle to move somewhat independently of the rest of your trailer. This helps to reduce wear and tear on the trailer and also ensures a smooth ride.


Slipper leaf springs attach to hangers that are welded onto your trailer. The eye of this spring will attach to the front hanger with a suspension bolt. The flat slipper end of the spring will slide into the rear hanger. If you have a tandem- or triple-axle trailer, the slipper end will slide into the equalizer that connects multiple springs. The shape of the slipper end of a leaf spring may vary slightly due to differences among trailer manufacturers. Because of this, it's important to check your leaf spring's slipper end before purchasing a replacement spring.


To mount this spring, you will need hangers, a suspension bolt, and possibly a spring keeper bolt, depending on the design of the rear hanger. If you are simply replacing a spring, you may still have hangers welded onto your trailer, but it would be wise to replace the bolts as they can experience wear. It is also recommended that you replace the other leaf spring in your setup at the same time. Because springs can sag and elongate as they wear, this new spring may not exactly match the old one, and the alignment of your trailer could be affected.


If you are fabricating a trailer, you will need to purchase a hanger kit for installation. To determine the type of hanger kit that you need, you must know the specific type of leaf spring that you have, as well as your axle capacity. Depending on the hanger kits used with them, springs can be configured to work for single-, tandem- or triple-axle applications. Hangers and other suspension components can also be purchased separately if there isn't a complete kit that works for your setup.



UNA-177 Universal Group Slipper Trailer Leaf Spring - 2 Leaf - 500-lb Capacity

Replaces WIC2






Customer Reviews

2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long - SP-177275

Average Customer Rating:  4.9 out of 5 stars   (121 Customer Reviews)

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.

- SP-177275
by:

The Slipper spring on a Calkins Trailer (23 yrs old) disintegrated and It took a while to find the replacement because Calkins in now defunct. The E trailer parts arrived in a few days . Everything went well except that the U bolt treads were too short so I had to jury-rig the second plate underneath so that the clamps tightened round the Axle and it is working fine. The first photos show Pre and Post the third photo shows that the axle itself is also corroded and though still strong, I reinforced it with Carbon fiber. 230237



- SP-177275
by:

Great price and in stock 882239



- SP-177275
by:

Product shipped fast and was exactly as advertised. 861610



- SP-177275
by:

Fast shipping! 856546



- SP-177275
by:

Exactly as advertised. Shipped the same day I ordered. Very well packaged. 855231



- SP-177275
by:

Very nice company to deal with, website is informative, I will be back. 818939



- SP-177275
by:

Worked perfectly 816317



- SP-177275
by:

Perfect fit and good quality. Will bye again. 812155



- SP-177275
by:

right part at a good price no problems since 806878



- SP-177275
by:

Reasonable price, quick delivery, exact replacement for my sagged, rusted together leaf springs on an old trailer I'm putting back on the road. They are made in China. I didn't see that in the description. Perhaps cou try of origin needs to be included. 794833



- SP-177275
by:

Product fit as it should and was easy to replace. Price was competitive. I'll come back to etrailer the next time, too. 778082



- SP-177275
by:

I really like these cheap 1.75" slipper springs. Unlike the even cheaper springs my jet ski trailer came with, these have a clamp to make sure they don't rotate or come apart in the front. These are a bargain for the price, but I would probably rate them in the 800 lbs range. 771158



- SP-177275
by:

They have everything you need for a boat trailer. Product comes in one or two days. Packaging is great. I recommend this Company to anyone that needs parts for their trailer. 763164



- SP-177275
by:

Everything was great 757121



- SP-177275
by:

product fit perfectly and it came completely as described very good service as well 752660



- SP-177275
by:

Great product for the price. The only draw back is you will have to weld spring tabs yourself. 747715



- SP-177275
by:

As ordered 737280



- SP-177275
by:

fit great, no problems 730603



- SP-177275
by:

I used the advertised measurements to pick a replacement for my broken spring. The new springs were shipped soon after I ordered. When they arrived a few days later, I was happy that the new springs matched exactly the old ones. 722001



- SP-177275
by:

Fast shipping, great service! 718674



- SP-177275
by:

This was a hard to find spring from a HARBOR FREIGHT Chinese Trailer. IT WAS A LITTLE LONG BUT SHOULD WORK FINE. Was shipped fast and at a better rate than quoted. these guys are good. thanks for the service, Dale 718570



- SP-177275
by:

Quick delivery. Great product. 714331



- SP-177275
by:

Extremely happy with my purchase. The package came very quickly and will definitely be a repeat customer. 692099



- SP-177275
by:

Great service and quick response. Very pleased with the product. 691184



- SP-177275
by:

Ordered new leaf springs for my trailer. Great website to locate what I needed. Order filled and on its way in less than 24 hrs. Delivery was ahead of schedule and product was just as advertised. Great customer service with an email at each step informing me of progress of my order. Great site and great company. 682272


Comments
I’ve put a lot of miles on my trailer since replacing the springs. Not a single problem and the ones I got are better than the factory supplies ones that came with the trailer. Still very happy with my purchase!
Ray - 08/09/2020

96762
27
124
Show More Reviews

Ask the Experts about this Universal Group Trailer Leaf Spring Suspension

  • Recommended Slipper Spring for Custom Kayak Trailer
    Thanks for the photos with measurements. The 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long # SP-177275 are rated for 500lbs each for use with a 1000K axle. This will work with the inside to inside measurement you are seeking. You will simply need the 9/16 inch bolt # 166079. If there is any extra space in the hanger it won't be an issue with the bolt and bushing.
    view full answer...
  • How to Determine if Slipper Spring SP-177275 Will Fit Trailer
    I can tell you how to determine if the 2-Leaf Slipper Spring for 1,000-lb Trailer Axles # SP-177275 will fit your trailer, though we do not have information regarding fits for individual trailers. The best way to determine if a slipper spring will fit is by measuring the length from the center of the spring eye to the end end of the spring, as you can see in the accompanying diagram. The best way to get an accurate length of a leaf spring is with the trailer up on jacks with the axle...
    view full answer...
  • Replacement Hook Style Leaf Spring for Trailer
    Thanks for the photo. The hook end you referenced is a slipper style leaf spring but without knowing the capacity of your axle or the width of the spring is it difficult to give you a replacement recommendation. I've attached the link for the page to all your leaf spring options to assist. The number of leaves doesn't matter but the length, width, and capacity does.
    view full answer...
  • Replacement Slipper Springs for 1985 Harding Boat Trailer
    I do have options for you but exact replacements for old boat trailers are hard to come by. In the majority of cases, items will need to be altered for an exact fit which I assume is what is going to need to be done on your trailer as well. We don't have a slipper spring that is 1-3/4" wide x 28" long (center of eye to end of spring) with a 2,500, 3,000, or 3,500 lb capacity. However, leaf springs will fatten out over time which means the leaf spring that was originally installed on the...
    view full answer...
  • Do Trailer Slipper Springs Normally Slip Out of their Rear Hangers
    It's hard to see in your picture but is the hanger open on the one side which allows the spring to slide out to the side? It shouldn't be open like that. If you need a replacement hanger we have the # 115706S for if you have a 1-3/4 inch wide spring. Slipper springs slipping out of their hangers is not common, even though saying that out loud and considering the name...it would seem like it would be! It would take a rather larger bump and perfect circumstances normally for a spring to...
    view full answer...
  • Replacement Leaf Springs and Tire for 13ft Rocket International Supreme Boat Trailer
    Thank you for all of that information; it definitely makes it easier to identify the appropriate parts, and it looks like you were on the right track. If your boat and trailer weigh less than 1000-lbs total, the UFP Slipper Spring for 1000-lbs Axles # SP-177275 is 24-5/8" long and will fit perfectly in the 23-1/2" center eye to slipper spring bolt hanger that you mentioned. If you think the boat and trailer combined weighs a bit over 1000-lbs, the # SP-178275 are a 1500-lbs spring with...
    view full answer...
  • Replacement Slipper Spring For Trailer Suspension that is 25 inches Long
    Since you said it was a hook leaf spring it sounds like you have a slipper spring on your trailer that you are looking to replace. Depending on your axle rating we have a few options. For a 1,000 lb axle part # WIC2, for a 2,000 lb axle part # SP-179275 , or for a 1,500 lb axle part # SP-178275. For a 4,000 lb axle part # 803T3.
    view full answer...
  • Can Double Eye Springs be Replaced with Slipper Springs on a 1969 Shoreline Boat Trailer
    In most cases switching from double eye to slipper spring requires new hangers and mounting hardware. This would require you to cut the old spring hangers off the trailer and mount the new hangers in the correct location for the slipper springs. Due to the extra welding involved, I suggest you stay with your original suspension set-up. To select the correct springs you need the weight capacity of each axle. Then you need to measure the dimension from center of eye to center of eye on...
    view full answer...
  • Replacement Slipper Spring To Upgrade Stock Malone Microsport Trailer Leaf Springs
    From what I can find online, it looks like the 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long, # SP-177275 is the best upgrade option for your malone Microsport trailer. This spring is 24-5/8 inches from the center of the eye to the end of the spring. It is 1-3/4 inches wide and has an axle capacity of 1000 lbs. I've attached a video review for you. The only other option for a similar size is the 3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer...
    view full answer...
  • Trailer Leaf Slipper Spring With Smallest Capacity
    I am not 100% sure what you are asking for or the parameters you have in mind other than the weight so the best I can offer is the lightest available leaf spring, which has a 500 lb capacity. - 2-Leaf Slipper Spring # SP-177275 This is a 1-3/4" wide slipper spring that measures 24-5/8" long; if you let me know the size you need I may be able to offer a recommendation. Additionally, I have added a link to a video review for you to check out as well as a couple links to help articles...
    view full answer...
  • Replacement Slipper Spring for Boat Trailer 1000-lb Axle
    Well-worn leaf springs can become elongated and actually measure longer than their length when new. It is not uncommon for a leaf spring to get as much as 3/4-inch to 1-inch longer from years of use. If your spring measures 25-1/4-inches long then chances are that when new it was indeed the 24-5/8-inch length of the Redline # SP-177275. This 2-leaf spring is rated for 1000-lb trailer axles; you can check the sticker on your axle to confirm it's weight rating. This spring does indeed...
    view full answer...
  • Can a Trailer with Slipper Spring Suspension be Converted to Double-Eye
    Sounds like your trailer has slipper springs and you are wanting to convert it to a double-eye system. This is definitely possible. It would be just a matter of changing springs and hangers. You would need to go with a leaf spring that is rated for the weight of your trailer when it is loaded an ready to go. I attached a page that has all of the double eye springs we offer. At the top is a chart that has all of the springs and their capacities. Select the capacity you need and then...
    view full answer...
  • Replacement Rear Hanger for Shorelandr Boat Trailer with 1-3/4 Inch Wide Slipper Springs
    If you are looking for a weld-on option we have 1 rear slipper spring hanger that fits 1-3/4 inch wide trailer suspension slipper springs. It is # 115706S. Please note that any welding should be performed by a professional welder. For a bolt-on option we have # CE14017G. I have also included a link to our help article on slipper spring suspension for you.
    view full answer...
  • 1,000 lb Slipper Spring Recommendation for John Boat Trailer
    The lowest rated trailer leaf springs we offer are for 1,000 lb axles like the slipper spring part # SP-177275. This might be a little stiff for your boat but would still work great. This is a very common spring for smaller boat trailers like your so it would be a great solution. If you needed a hanger kit you'd then want the part # APS3SE and you'd be set.
    view full answer...
  • Replacement Axle and Leaf Springs for 1970s Shoreline Single Axle Boat Trailer
    Since your axle capacity is unknown - and since it is also rust damaged - you're probably on the right track in thinking of replacing it. We offer both axle beams by themselves and in kits that also include hubs, bearings, races etc. Please see the linked page. We also offer axle-less suspension systems from Timbren, such as their 3500-lb-rated # ASR3500S05. These unique systems mount directly to your trailer frame - no axle needed - and they can save you lots of install time, potentially...
    view full answer...
  • 1,500 lb Slipper Springs or 1,000 lb Slipper Springs for a Trailer
    The best way to pick out a slipper spring replacement for a trailer is to base it off of the weight capacity for the trailer and then the dimension of the spring getting replaced. Sounds like you are considering going with the # SP-178275 over the # SP-177275 for your trailer. Both of these springs share the same dimensions, but since your old springs seem to be too soft it would seem like the # SP-178275 would be a better choice. You should note that going with a higher rated spring...
    view full answer...
  • Shoreline Boat Trailer Wobble Roller Recommendation
    Looks like you have the Yates Ribbed Wobble Rollers part # YR530R-6P installed on your Shoreline boat trailer. We do not carry any pieces that are internal of the roller like a bushing if that is what you are referring to. We carry the retainer rings part # CE10981 and the wobble roller washers part # CE10983, but if you need a different part of the wobble roller replaced you will have to go ahead and replace the entire roller.
    view full answer...
  • How to Order The Correct Slipper Springs For A 1970s Harding Boat Trailer
    The springs you have on your boat trailer are called slipper springs. One end of the spring has an eye and the other is an arched, open end. The front eye of the spring is attached to a front hangar on the trailer and the slipper end is inserted into a rear hangar. To get the correct slipper spring for your trailer you will need to know the number of leaves, the width of the spring, the length of the spring, and the weight rating of the axle on your trailer. The 2-Leaf Slipper Spring...
    view full answer...
  • 1000 lb Capacity Slipper Springs For 400 lb Sailboat Trailer To Ease Rigid Ride
    The 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long, # SP-177275 will most likely work well on your trailer and will ease the beating on your 400 lb sailboat. The 3/8 inch difference in length from your current springs shouldn't be an issue based on the curve, so I don't forsee an issue. However, if you find out it does bind and cause issues, you would need to move the mount. Since you will be lowering the capacity of your trailer, make sure your boat...
    view full answer...
  • 1975 Dilly Boat Trailer Leaf Springs Replacement Solution
    The closest leaf spring we have is the Slipper part # SP-177275 which is 30 inches overall and is rated for an 1,000 lb axle. This spring could work for you but you'd have to move in your hangers a bit closer most likely.
    view full answer...
  • Replacing Leaf Springs On Trailer To A Lower Capacity To Avoid Road Shock
    Yes you can replace the leaf springs that came standard on the trailer to soften the ride of the trailer. Just be advised that the total capacity of the trailer will be lowered because you will be limited by the lower rated springs. You can refer to the linked articles for help in selecting appropriate springs for your trailer. Do note that very well-worn springs can become elongated from years of use. If you remove a spring from the trailer and measure it you may find that it has become...
    view full answer...
  • Distance Between Slipper Spring Hangers When Used with Slipper Spring # SP-177275
    The distance from the center of the bolt hole on front hanger to the rear hanger for the slipper spring # SP-177275 would need to be 23-1/8 inches. I attached an FAQ article on slipper spring suspension systems for you to check out as well.
    view full answer...
  • Size of Bushing Inner Diameter in Slipper Leaf Springs
    Replacement trailer leaf springs should be selected based on axle weight rating and also on spring length. The 2-Leaf Slipper Spring # SP-177275 fits 1000-lb-rated axles, is 24-5/8-inches long and has 9/16-inch inner diameter (11/16-inch outer diameter) bushings like # TRBU11566. None of the slipper springs we offer has a 1/2-inch inner diameter bushings, either 9/16-inch or larger. All such springs are shown on the linked page. Be sure to replace your springs in pairs to avoid issues...
    view full answer...
  • How to Pick Out Slipper Spring for a Jon Boat Trailer
    Your trailer has pretty short slipper springs. Since we don't have any slipper springs short enough your best option is going to be to determine what spring capacity you would need and then get the correct spring for that and then move the hangers of your trailer so that it will accommodate the spring. I attached a page that has a chart with all of the slipper springs we carry for you to check out. Having a trailer sitting lower on one side than the other has potential for tire wear...
    view full answer...
  • Recommended Leaf Spring Capacity for a Conversion Boat Trailer
    Yes and no, a leaf spring with a lower capacity will provide a better quality ride than a leaf spring with a higher capacity but you will not want to make that part the lowest rated suspension component. Typically, we recommend choosing a leaf spring with a capacity that either meets or exceeds the capacity of the axle. I would be skeptical if the leaf spring pack you have now is only rated at 1,000 lbs. However, since you have converted a boat trailer to a light duty kayak carrier...
    view full answer...
  • Slipper Spring Recommendation for Replacing 26 inch Long Spring
    The closest slipper spring to what you are looking for is the part # SP-177275 which is 1-3/4 inches wide, 2 leaves, and an overall length of 30-1/4 inches. This spring is designed for 2,000 lb axles. If the distance between your spring hangers is 27-3/8 inches this would work well for you assuming the axle capacity is correct.
    view full answer...
  • Replacement Trailer Slipper Spring for a WaveRunner Trailer
    Trailer springs tend to stretch out around 1/2 inch from the dimension they had when new. For your waverunner trailer the part # SP-177275 should work well as it has a 1k axle rating and is 23-1/8 inches long where yours is 24. We don't have galvanized springs unfortunately, and I would recommend you keep the spring over/under the axle in the same configuration as you have it now.
    view full answer...
  • Finding VIN on Trailer to Register and Purchase Tag
    A Vehicle Identification Number (VIN) can be found in many different locations on a trailer. It is most common to be found near the coupler on a plaque or embossed into the frame. It however can be anywhere on the trailer frame as there are not consistent rules for this. If you cannot find the VIN anywhere on your trailer frame, you can call your local highway patrol and they can issue one to you so you can register your trailer.
    view full answer...

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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Jeff D
Written by:
Alexander C

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