Trailer Suspension > Leaf Springs > For Double Eye Springs > For 1-3/4 Inch Wide Spring > 5000 lbs > 4 Leaf > 25-1/4 Inch Long > Redline

4-Leaf Double-Eye Spring for 4,800-lb Trailer Axles

Rating: rating rating rating rating rating
34 reviews

Code: PR4

Retail:$36.98

Price:$24.95

Shipping Weight: 14 pounds

Shipping Special

Orders of $150 qualify for free shipping.
Lowest Price Pledge

Redline Trailer Suspension PR4 Review - Video

Redline Trailer Suspension - PR4

This 4-leaf double-eye spring is 25-1/4" long x 1-3/4" wide. It is designed for use with 4,800-lb trailer axles.

Features:

Flexes to absorb road shock and provide smooth ride
Reduces wear and tear on trailer
Ensures level ride on bumpy and uneven surfaces
Mounts to trailer frame with hangers or a hanger kit (sold separately)
Includes nylon bushings

Specs:

Number of leaves: 4
Spring width: 1-3/4"
Eye diameter: 9/16"
Spring capacity: 2,400 lbs
Axle capacity: 4,800 lbs
Dimensions: see table

Part Number	A	B	C
PR4	25-1/4"	3"	12-5/8"

Leaf springs are an integral part of your trailer suspension system. The double-eye spring is suspended at the ends by hangers that attach to its eye or, in the case of tandem-axle or triple-axle systems, into hangers in the front and rear and an equalizer or equalizers in the center. To determine the type of hangers or hanger kit you need, you must know the specific type of leaf spring you have, as well as your axle diameter and capacity. Depending on the hanger kits used with them, springs can be configured to work for single-, tandem- or triple-axle applications.

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

PR4 Trailer Double Eye Spring - 4 Leaf - 2,400 lbs

Video of 4-Leaf Double-Eye Spring for 4,800-lb Trailer Axles

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

Video Demo Redline Trailer Suspension PR4

Redline Trailer Suspension PR4 Review

Video Transcript for Redline Trailer Suspension PR4 Review

Today well gonna be taking a look at part number PR4, the 4-Leaf Double-Eye Spring for 4,800-lb Axles.Before you order a spring for your trailer, there are a few things you will need to know first. This spring measures 25 inches long by 1 -inch wide. You will need to know the springs half-length which is measured from the center of the eye mount to the center of the spring here at the leaf bolt. This spring has a 12 5/8-inch half-length. You will need to know the spring height. To get this height measurement, youll need to draw an imaginary line from the center of the eye mount on either side across.

From this line you can measure to the spring surface which will give you your spring height. In this case, it is 3 inches.Youll notice it has two 9/16 mounting eyes with nylon bushings within them. These nylon bushings help to prevent metal on metal contact while the spring is on the trailer.With its 4 leaves it has the ability to support 2,400 lbs. When you multiply that by two per axle, you get your 4,800-lb total capacity.And that does it for part number PR4, the 4-Leaf Double-Eyed Spring for 4,800-lb axles. .

Customers compare PR4 to these similar products

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles $20.95

5-Leaf Double-Eye Spring for 6,000-lb Trailer Axles $28.95

6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles $36.95

3-Leaf Double-Eye Spring for 3,500-lb Trailer Axles $22.95

4-Leaf Double-Eye Spring for 3,000-lb Trailer Axles $26.95

Customers Who Purchased This Trailer Suspension Also Bought...

Shackle Bolt with Locknut for Double-Eye Springs - 3" Long $3.08

Wet Equalizer Bolt with Locknut and Grease Zerk for Double-Eye Springs - 3" Long $3.08

Shackle Strap - 2-5/8" Long $0.65

Shackle Strap - 2-1/4" Long $0.70

Shackle Strap - 3-1/8" Long $0.70

Ask the Experts about this Redline Trailer Suspension

How Thick is the PR4 Leaf Spring Spring Pack and Will the 2-3/8 inch Round Trailer U-Bolts Work
I went out to the warehouse and measured one of the # PR4 Double Eye Leaf Springs and the related parts that we carry. The spring pack is 1-9/16 inch thick, not including the centering bolt and nut. Each layer is approximately 3/8 inch thick. The 2-3/8 inch Round Trailer U-Bolts (Qty 2), item # SP01-040, are 5-1/2 inches long. The total thickness of axle, 2-3/8 inches and spring pack will be right at 3 inches. You will need to add the thickness of the spring seat, our spring seat # TRSS300
view full answer...

Replacement Springs for a 2004 Cougar Model 278 5th Wheel Trailer
Since the trailer manufacturer rates the axles at 3,500 pounds each, that means that the 4,400 pound axle has been derated because of the placement of the suspension hardware on the axle, to fit your specific trailer. This means that there is no excess capacity to take advantage of. Using a spring rated for a higher capacity than the manufacturer axle rating can cause other parts of the suspension, like the axle itself or bearings, to be the weakest link and take more abuse than intended, bec
view full answer...

Parts Needed to Replace Leaf Springs, Shackles and Hangers on a Tandem Axle Trailer with 3 Inch Axle
The # PR4 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 # PR6, 6-Leaf Double-Eye Spring. The PR6 spring has a 24-7/8 inch length and will have the same axle spacing, 34 inches, as the PR4 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 trailer. To install the PR6 Spring
view full answer...

How to Determine Leaf Spring Capacity for a 1996 Four Winns Tandem Axle Boat Trailer
You will need to determine the capacity of each axle on your trailer to determine the spring capacity that is appropriate for your axles. There should be a tag on the trailer tongue, or if not on the tongue, on each axle that gives you the axle weight ratings. Once the axle capacity is determine.d each spring should be rated for 1/2 of the axles capacity and measure the same from center of spring eye to center of spring eye as your original springs for proper operation. The number of leafs an
view full answer...

Recommended Hanger Spacing For 4-Leaf Springs # PR4 on Tandem Axle Trailer
You mention that you have a tandem axle with 3 inch axles. A 3 inch axle has a weight capacity rating of 6,000 lbs to 7,200 lbs. The leaf springs for that axle would be the part # PR5. These springs have a weight capacity of 2,900 lbs and are designed for 5,800-lb and 6,000-lb axles. The PR4 springs you have mentioned show a weight capacity of 2,400 lbs. So two of the # PR4 springs are designed for 4,800-lb to 5,000-lb axles. I would recommend to check the weight capacity of your axles to ma
view full answer...

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
view full answer...

Leaf Spring Recommendation for a 2007 Load-Runner Tandem Axle Cargo Trailer w/ 4,900 lb Capacity
Since your trailer is a tandem axle trailer the carrying capacity of it will be split between the two axles. So you will need 3,500 lb axles springs. The 3-leaf Double Eye Spring # PR3 is what I would recommend you get for your trailer. Since it is always a good idea to replace springs in pairs I would recommend you get two of these springs and replace both springs on the axle. You will want to make sure that the distance between your spring hangers is 25-1/4 inches apart on center. If this d
view full answer...

Can Springs Be Upgraded on 5th Wheel Trailer With 5,200-Lb Axles
You may go up to a higher weight capacity spring as long as the eye-to-eye length and the width will fit, but the higher capacity springs WILL NOT increase the weight capacity of your trailer. The weight capacity will still be limited to whatever the lowest rated component of the system is, whether it be the axle, the shackles or the equalizer. If you decide to go with the higher-rated springs, you will be making the axle and the spindles the lowest-rated component, which can cause failure of th
view full answer...

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 the
view full answer...

Info for this part was:

Written by:
Ray

Edited by:
Fran

Test fit by:
Rick

Video by:
Zack

Expert Research
Bob

Expert Research
Mike H

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.

Trailer Suspension > Leaf Springs > For Double Eye Springs > For 1-3/4 Inch Wide Spring > 5000 lbs > 4 Leaf > 25-1/4 Inch Long > Redline

4-Leaf Double-Eye Spring for 4,800-lb Trailer Axles

Redline Trailer Suspension - PR4

PR4 Trailer Double Eye Spring - 4 Leaf - 2,400 lbs

Video Transcript for Redline Trailer Suspension PR4 Review

4-Leaf Double-Eye Spring for 4,800-lb Trailer Axles - PR4