How Lippert Equa-Flex Works, and How to Pick the Right Tandem or Triple Kit

Lippert Equa-Flex is a rubberized equalizer system for tandem and triple axle trailers. Choosing one starts with the trailer's suspension, not just the word "heavy-duty." Axle count, double-eye leaf springs, the kit's application and, on a triple, axle spacing all matter.

This guide explains the parts and the selection process using Lippert's installation manuals and component guides. Always follow Lippert's own installation instructions for the specific kit. The information below is a buying guide and installation overview, not a substitute for those instructions.

Key takeaway

• Equa-Flex combines pivoting components with rubber. Lippert identifies the system as a rubberized equalizer, and its dimension guide explains that the rubber compresses when installed and under load.
• Start with axle count and spring type. The aftermarket manuals cover tandem or triple axle trailers with double-eye leaf springs, not a universal fit for every trailer suspension.
• Short and long triple kits are different layouts. Lippert's OEM manual specifies short-arm triple equalizers for 33-inch axle spacing and long-arm versions for 35-inch spacing, measured between the first and second wheel centers.
• Match the exact part number. Capacity labels alone do not settle fitment. Confirm the application, hanger arrangement and hardware before ordering.
• Plan for mounting hardware separately. Lippert says center hangers and other mounting hardware are sold separately and recommends new shackle links, shackle bolts and nuts for installation.

What is Lippert Equa-Flex?

Lippert calls Equa-Flex a rubberized equalizer system for tandem and triple axle trailers. Its assembly drawing identifies the frame hanger, equalizer bolt, leaf springs, shackle links and pivot arms. The triple axle drawing adds a fixed arm. In other words, this is an equalizer assembly within the leaf spring suspension, not a replacement axle or a replacement leaf spring (OEM installation manual, page 2; Equalizer Assembly, page 1).

The aftermarket tandem manual identifies two kit numbers: 2024114953 and 2024115051. The triple manual identifies 2024115101 as the short kit and 2024115382 as the long kit. Those are the four Equa-Flex kits covered here. Match the number as well as the description when comparing an existing installation with a new kit.

How does the rubberized equalizer work?

The useful distinction is the combination of pivoting parts and a compressible rubber element. Lippert's assembly drawing shows the shackle links connected to pivot arms. Its Component Dimension Guide explains that the rubber compresses when the equalizer is installed, and that dimensions vary with the trailer and its overall weight loads (page 1, Purpose). Equa-Flex therefore should not be treated as a rigid shape whose unloaded dimensions will remain unchanged on the trailer.

That matters when identifying a replacement. An equalizer photographed on a workbench and an equalizer carrying the trailer's weight may not have identical dimensions. Use the appropriate Lippert drawing and application information rather than deciding fitment from a photograph alone. The guide specifically describes its measurements as unloaded and not installed.

This post does not promise a particular percentage of shock reduction or compare ride-test scores. The practical selection question is whether the rubberized assembly is the correct Equa-Flex configuration for your suspension. Its pivot arms, fixed arm where applicable, bushings and attaching hardware must be considered together.

First match the axle count and double-eye springs

Lippert's tandem and triple aftermarket manuals both identify double-eye leaf springs in their Introduction sections on page 2. Do not use the word "equalizer" alone to assume that these kits also fit a slipper spring suspension. The documented application here is double-eye.

If you are unsure which spring is on the trailer, begin with Double Eye vs Slipper Leaf Springs. Identify the existing spring type before choosing an equalizer kit. Then separate the two-axle tandem layout from the three-axle triple layout.

The distinction affects kit contents. The tandem manual's page 3 parts lists show two equalizer assemblies in each tandem kit. The triple manual's page 3 parts lists show two assemblies of one type and two fixed-arm assemblies in each triple kit. A triple kit is not simply an extra copy of the tandem kit.

The four Equa-Flex kits at a glance

Capacity ranges: use Lippert's stated applications, not a similar listing title alone. The tandem manual labels 2024114953 as 4-6K and states a weight capacity from 3,000 to 6,000 lbs. in its Introduction. It labels 2024115051 as 5-8K and states a weight capacity from 5,000 to 8,000 lbs. Confirm the part number and that stated application before ordering. Those ranges are not a promise that every trailer in the numerical band is a fit.

What does "short triple" mean?

It describes the triple axle equalizer arrangement, not a lower capacity class. Both current triple kits are identified as 5K-8K in Lippert's aftermarket manual. Page 2 of the OEM manual says that a trailer measuring 33 inches from the center of the first wheel to the center of the second uses the short-arm triple option. A trailer measuring 35 inches uses the long-arm option.

Do not confuse axle spacing with hanger spacing. Lippert's Component Dimension Guide separately shows hanger-spacing layouts for short and long triple assemblies. Its measurements describe unloaded components, and the guide notes that rubber compression changes installed dimensions. Have the complete layout checked against the correct instructions rather than using one dimension as a universal retrofit guarantee.

The triple manual also shows why the arm matters: the front equalizer is installed with its fixed arm facing the rear of the trailer, and the center axle's spring attaches to that arm. Lippert requires a longer shoulder bolt at the fixed-arm spring attachment (page 7, Front Axles). Choosing the right triple kit includes matching this arrangement and hardware, not just counting four equalizers.

What to confirm before ordering

1. Record the axle count and axle rating. Use the identified trailer and axle information to check the exact kit application; do not choose from a similar-looking equalizer alone.
2. Confirm double-eye leaf springs. That is the spring type named in both aftermarket manuals.
3. Identify the existing equalizer and mounting arrangement. Record readable part numbers and compare the hanger, pivot arms and, on a triple, fixed-arm layout with Lippert's drawings.
4. Measure triple axle spacing at the wheel centers. Lippert distinguishes its 33-inch short-arm and 35-inch long-arm options using that measurement.
5. Check hangers and attaching parts. Lippert lists center hangers and other mounting hardware separately. Confirm what must be ordered with the kit.
6. Use the specific installation manual. Review the required hardware, support precautions and final shackle position before beginning work.

For background on suspension layout, see Hanger Spacing for Single and Tandem Leaf Spring Axles. That general guide does not replace Lippert's Equa-Flex instructions or establish interchangeability with an existing hanger kit.

Installation overview: support, hardware and orientation

Safety first: Lippert warns that the trailer must be supported according to the manufacturer's recommendations before anyone works underneath; failure to do so may cause death or serious injury (both aftermarket manuals, page 2, Safety). Their Prior to Installation sections also warn against jack-stand contact that damages under-trailer panels or lines and describe supporting the framework and axles separately. Follow those instructions in full.

At a high level, the manuals cover safely unloading the suspension, removing the old equalizer, installing the correct Equa-Flex assemblies and attaching the spring/shackle components. They specify label orientation and bolt direction. The triple instructions add the rear-facing fixed-arm arrangement. This overview deliberately does not reproduce the removal and installation sequence.

Hardware is not an afterthought. Lippert recommends new shackle links with shackle bolts and nuts, and says the shackle-link kits are not included (both aftermarket manuals, page 5). The tandem parts list shows two equalizers; it should not be read as a complete hanger-and-hardware package.

Lippert gives torque instructions for the identified shoulder-bolt connections in the installation sections. Use those instructions for the exact hardware being installed rather than applying a generic trailer torque chart. The manuals also require even lowering without dropping the trailer and checking that shackle links are upright, approximately at the 10 o'clock and 2 o'clock positions (tandem, page 6; triple, page 8).

Inspection and lubrication: use the correct version's instructions

Both aftermarket manuals recommend inspecting and replacing worn or damaged shackles and bolts (page 4, Parts Available for Purchase). Make that check part of planning the purchase, not something discovered after the equalizers arrive.

Greaseable and non-greaseable versions are not interchangeable descriptions. Lippert's Equalizer Components guide identifies the four kit numbers discussed here as non-greaseable pivot versions (pages 1-2). Its OEM manual separately discusses greaseable options that depend on bolts with grease fittings and specifies NLGI GC-LB multipurpose grease for those applications (pages 2, 5-6). Do not infer that a non-greaseable pivot kit includes wet bolts or that every joint has the same lubrication requirement. Follow the instructions for the actual kit and attaching hardware fitted to the trailer.

Frequently asked questions

Will these Equa-Flex kits fit slipper leaf springs?

The tandem and triple aftermarket manuals document double-eye leaf spring applications. They do not establish slipper compatibility. Do not order one of these kits as a slipper replacement without a separately verified application.

Is the short triple kit lighter-duty than the long triple kit?

Not in the current triple manual: both are identified as 5K-8K. Short versus long is a layout choice. Lippert's OEM manual ties those options to 33-inch versus 35-inch first-to-second wheel-center spacing.

Does the kit include new shackles and hangers?

Do not assume so. Lippert says the center hanger and other mounting hardware are sold separately and recommends new shackle links, bolts and nuts. Check the specific parts list and order the required attaching parts separately.

Can I compare the new part's measurements with the loaded equalizer?

Not as a direct, unchanged dimension. Lippert's Component Dimension Guide says its dimensions are unloaded and not installed; rubber compression and trailer weight affect the installed dimensions.

Southwest Wheel - Your Trailers Best Friend Since 1919.

References

• Lippert Equa-Flex Tandem Axle Installation and Owner's Manual (For Aftermarket Applications): pages 1-3 (kit identification, Introduction, Quick Facts, Safety and Parts List); page 4 (Parts Available for Purchase); page 5 (Prior to Installation); page 6 (Installation).
• Lippert Equa-Flex Triple Axle Installation and Owner's Manual (For Aftermarket Applications): pages 1-3 (kit identification, Introduction, Quick Facts, Safety and Parts List); page 4 (Parts Available for Purchase); page 5 (Prior to Installation); pages 6-8 (Installation, Rear Axles and Front Axles).
• Lippert Equa-Flex Tandem and Triple Axle OEM Installation Manual: page 2 (System Information, Tandem Axle Equalizer Options and Triple Axle Equalizer Options); pages 5-6 (Installation, greaseable hardware notes).
• Lippert QR-040, Equa-Flex Component Dimension Guide: page 1 (Purpose); pages 4-5 (Equa-Flex Dimensions-Triple Axles).
• Lippert Equa-Flex Equalizer Assembly: page 1 (Tandem Axle and Triple Axle; Triple Axle).
• Lippert Equa-Flex Equalizer Components: pages 1-2 (Tandem Axle Aftermarket Kits, Triple Axle Aftermarket Short Arm Kit and Triple Axle Aftermarket Standard Arm Kit).