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  1. Trailer Axles
  2. Timbren
  3. 5200 lbs
  4. Universal Fit
  5. Spindles Only
  6. Lift - 4 Inch
Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Off-Road Tires - 5,200 lbs
Timbren

Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Off-Road Tires - 5,200 lbs

Part Number: T99GR
In Stock
$1,475.55
Trailer Axles
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The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. 4" Lift spindle allows for maximum ground clearance. Fits any frame width. Great Prices for the best trailer axles from Timbren. Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Off-Road Tires - 5,200 lbs part number T99GR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Trailer Axles - T99GR

  • 5200 lbs
  • Universal Fit
  • Spindles Only
  • Lift - 4 Inch
  • No Hubs
  • Rubber Spring Suspension
  • Timbren
  • Standard Grade

The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. 4" Lift spindle allows for maximum ground clearance. Fits any frame width.


Features:

  • Suspension system provides a safe, smooth, quiet ride for your trailer
    • 2 Separate units replace your existing axle
  • AEON progressive-rate main springs absorb road shock and support trailer's load
    • Deliver a smooth, stable ride, regardless of load size
    • Compress and become stiffer as load increases, boosting spring strength
  • Rebound springs act as return devices to minimize rattle and bottoming out
    • Create constant pressure on the arm, so the suspension is never completely relaxed
  • 2 Independent units can eliminate the need for a thru axle
    • Increase ground clearance
    • Lower deck height for easier loading and unloading
    • Reduce roll during cornering
    • Fit any trailer width
  • Built-in camber and toe-in help your trailer to track straight, reducing wear on the tires
  • 4" Lift, EZ Lube spindles accept trailer hubs (sold separately)
    • 4" Lift provides maximum ground clearance
    • Spindles can be easily removed from units for simple replacement if damaged
  • Heavy-duty steel construction with black powder coat finish resists wear and corrosion
  • Easy to install and align
    • Bolt or weld to your trailer's frame


Specs:

  • Fits: 1-axle and 2-axle trailers that use low-pressure, off-road tires
    • Maximum tire size: 35 x 12.5 x 20
    • Not recommended for triple-axle applications
  • Weight capacity: 5,200 lbs
  • Quantity: 2 suspension units without hubs
    • Works with Dexter 5,200-lb hubs (8-201-5UC3-EZ and 8-213-5UC1-EZ - sold separately)
  • Spindle/Hub compatibility:
    • Bearings: 25580 inner/15123 or LM67048 outer
    • Seal inner diameter: 2.250"
  • 3-Year limited warranty


Note: The Timbren Axle-Less suspension system may require additional support on your trailer. If your trailer does not have a crossmember above the spot where you want to install the Timbren system, you may need to reinforce the frame. You can accomplish this three ways. First, you can retrofit the trailer with a crossmember. Second, you can build out the trailer frame. Third, you can use 2" x 3" steel tubing to connect the 2 Timbren suspensions together using the built-in hole on each unit.


Ground Clearance

Ride on rubber with Timbren's Axle-Less trailer suspension system. This one-of-a-kind suspension consists of two separate units, each containing rugged steel arms and two strong, hollow rubber springs. Overall, the system safely and effectively absorbs road shock, minimizes trailer bounce and rattle - regardless of load size - and helps to protect your trailer's components and cargo. Built-in camber and toe-in keep your trailer tracking straight to minimize tire wear. Integrated hangers attach to your trailer's frame. And 2" x 3" holes make it easy to reinforce your trailer's frame by adding steel tubing (if needed).


The Axle-Less independent suspension system replaces your trailer's existing leaf spring suspension and can eliminate the need for an axle. The independent action of the suspension reduces roll when your trailer is cornering and allows you to maximize ground clearance and minimize deck height. Your trailer can have the same side-to-side clearance as your tow vehicle.


Because you're riding on rubber, your trailer will ride smoothly and comfortably, whether you're navigating rocky terrain or highway asphalt.


Timbren Axle-Less Suspension Parts

Components

  1. The AEON progressive-rate main spring supports the weight of your trailer and cargo and easily absorbs road shock. It is constructed of heavy-duty, hollow rubber.
  2. The rebound spring minimizes trailer bounce, rattle and bottoming out. It keeps the suspension under constant tension and ensures that the main spring compresses and expands in a controlled fashion. And it delivers a smooth, stable ride - regardless of how much cargo is on the trailer.
  3. The trailing arm and integrated hanger attach the suspension to the side and bottom of the trailer frame.
  4. The control arm carries the spindle and the hub. It pivots on strong, long-lasting urethane bushings that never require lubrication.
  5. The EZ lube, 4" lift spindle (straight model shown) is simple to grease. If damaged, it can be removed and replaced, saving you both time and money.
  6. The hub is not included with this model.
  7. The built-in hole accepts 2" x 3" tubing. If there is no crossmember above the suspension, you can easily add support to your trailer's frame by inserting 2" x 3" steel tubing through the hole on each suspension unit and then bolting the tubing into place.

Timbren Axle-Less Suspension versus Leaf Springs

Leaf Spring Example

The Axle-Less suspension's progressive spring is a definitive upgrade over leaf springs. Although leaf springs deliver a stable ride when supporting a load, a trailer with leaf springs will bounce and rattle when it's empty or supporting a light or off-center load. On the other hand, your trailer can bottom out on bumpy roads if the load is too heavy. The AEON progressive-rate springs of the Axle-Less suspension always deliver the same reliable performance, no matter the load size. As more weight is added to the trailer, the springs compress and become stiffer, offering more support for heavy loads. And because they rebound more slowly than leaf springs, the AEON springs do a better job of absorbing road shock, thereby keeping your trailer from bouncing and rattling when you're carrying a light load. So with this versatile system you will enjoy a smooth ride whether you're towing an empty trailer or a hefty load.


Unlike leaf springs, Timbren's Axle-Less suspension units operate independently of one another. Each spring activates only when needed. This reduces roll and delivers top-notch performance, even when you're hauling off-center loads. When your trailer with leaf springs takes a turn, one side of the suspension compresses and takes on more weight, and the other side becomes looser and bounces. This causes rattle and can make the trailer lean to one side. But when your trailer with the Axle-Less suspension takes a turn, one side compresses and becomes more rigid to absorb the weight, and the other side expands to normal height to help steady the load and minimize bounce and rattle. The load stays better balanced, even if it is off-center.


Timbren Axle-Less Suspension versus Torsion Axles

Torsion Axle Example

Timbren's Axle-Less trailer suspension system is a great alternative to torsion axles. While both systems allow either side of the trailer's suspension to operate independently, only Axle-Less suspensions are actually separate units. Torsion axles still require a bar that spans the bottom of your trailer, whereas Timbren's system can eliminate the need for a thru axle - giving you the same amount of ground clearance from the front of your trailer to the rear. It also allows Axle-Less suspensions to fit any trailer width - unlike torsion axles, which have to be fitted to an exact frame width.


Axle-Less suspensions operate in a smoother, less stressful manner than torsion axles. Torsion axles use a twisting motion, where the bar inside the axle tube rolls against rubber cords or a rubber wall to create compression and resistance. The up-and-down motion of the main spring and the side-to-side motion of the rebound spring in Timbren's Axle-Less suspension work together to provide smooth, consistent compression - with no twisting - that results in a better ride and less stress on the suspension's components.


Installing the Timbren Axle-Less Suspension

Whether you are building a trailer or retrofitting your existing trailer with the Axle-Less system, you must make certain that the trailer's frame is both perfectly square and sturdy enough to support a heavy load without the aid of a thru axle.


Install Option 1

There are three ways to install the Axle-Less suspension. The easiest method, which is recommended if you are replacing axles on your trailer, is to install a piece of 2-inch x 3-inch rectangular tubing (sold separately - available at most weld shops) through the integrated hole in the Axle-Less suspension. Then all you need to do is bolt the suspension to the side of the trailer's frame with three bolts (not included).


Install Option 2

The second option for installation is to fabricate an inboard extension plate that attaches the trailer's frame to the Axle-Less suspension.


Install Option 3

The third method of installation is to bolt the Axle-Less suspension's hanger to the trailer's frame and to an existing crossmember that is in the area where you want to install the suspension.


With both the second and third options, you must use three bolts to attach the suspension to the side of the frame. And you also have to use two or three bolts to attach the suspension to the bottom of the frame extension, or crossmember. Both the second and third methods of installation will eliminate the need for a thru axle and provide the most clearance.


Measuring Diagram

Timbren's Axle-Less suspension units should be installed directly across from one another. Before mounting the units, measure back from the coupler and mark the frame to make sure that the two distance measurements (A and B) are within 1/8 inch of each other. Then you can drill holes through the frame and attach the hangers with Grade-5, half-inch bolts (not included).


Dimensions of the Timbren Axle-Less Suspension

The following diagrams show measurements that were taken with electric drum brakes installed on the Timbren Axle-less suspension system.


Dimensions 1

Dimensions 2

Dimensions 3

Dimensions 4



ASR52HDS04 Axleless Trailer Suspension System by Timbren - 4" Lift Spindle - Without Hubs - Regular Tires - 5,200 lbs

Installation Details T99GR Installation instructions



Ratings & Reviews

4.8

4 reviews
The Axle-Less system provides a smooth, quiet, safe ride and can eliminate the need for an axle. Suspension units replace your existing axle and operate independently. 4" Lift spindle allows for maximum ground clearance. Fits any frame width.

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See what our Experts say about this Timbren Trailer Axles

  • Is There Timbren 5,200 lb Axle Less Kit that Can Fit Wider Tire Sizes
    Hey Fernando, so our best option would be the version of the same Timbren Axle Less kit but it was designed for off road tires part # T99GR. The max tire size this works with is 35x12.5-20 instead. Only other difference is that it has a 4 inch lift instead of a 2 inch lift.
    view full answer...
  • Can Trailer Have Suspension Replaced with More Off Road Style Suspension
    Hey Jamal, yes it is possible. There are torsion axles that have more of a lift built into them and there are also the Timbren Axle Less that are really nice for off road like the part # T99GR which also has a 4 inch lift built into it. Its also designed for wider off-road wheels and tires too. This is designed to replace a 5,200 lb axle. It doesn't have a crossbeam that runs under the trailer too so that helps a lot with ground clearance.
    view full answer...
  • Axle Needed For An Off-Road Utility Trailer With 40x13.50 Tires And A 8x170 Wheel Bolt Pattern
    Hey Will, The problem with the tire size is that if you go too large the wheels are going to rub the trailer. Timbren having done the math already and listing the maximum as 35 x 12.5 x 20 lets us know that you'd really need to make some serious modifications to the trailer to get it to fit and would still need a wheel spacer to go from 8x6.5 to 8x170. Even though the Timbren axle-less system is great for off-road setups it just isn't designed for your larger tire size so the easiest...
    view full answer...
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  • Recommended Parts to Build and Carry a Rooftop Tent on an Off-Road Trailer
    I've got the best combination of parts for you to get your trailer setup for off-road towing! Here is a list of the parts I recommend using: - Timbren Axle-Less Trailer Suspension 3.5K # ASR35HDS02 - OR - 5.2K # T99GR - Lock N Roll Coupler A-Frame # 336TS504 - OR - Straight Tongue # 336TS528 - Lock N Roll Articulating Hitch # 336VS503505 - Yakima OverHaul HD Adjustable Ladder Rack - 54" Track Mount - 68" Crossbars # Y54KR All of these parts are great for off-roading because they...
    view full answer...
  • Will Using 2 of the Timbren Axle-Less Trailer Suspension Kits Double the Capacity?
    Yes, you can use 2 of the Timbren Axle-Less Trailer Suspension Kits # ASR35HDS02 which will give you a total trailer GVWR of 7,000lbs. Do understand you must include the weight of the trailer into this calculation. If you are needing to carry 7,000lbs above the weight of the trailer you will want 2 of the Timbren Axle-Less Trailer Suspension Systems # T99GR which each have a 5,200lb capacity.
    view full answer...
  • Timbren Axle Less kit for 4,000 lb Trailer that has 4 inch Lift
    The Timbren Axle Less Kit part # ASR2KHDS03 that you referenced is essentially a 2,000 lb axle so it would take two of them for a 4,000 lb trailer. If you have a 4,000 lb trailer axle the most similar option that would work well you'd want the Timbren # T99GR which has a 4 inch lift like the axle you mentioned and has a 5,200 lb capacity so it would work great.
    view full answer...
  • Availability of Timbren Axle Less Kit with 4 inch Lift and 6 Lug Bolt Pattern and Brakes
    Hey Richard, you'd want the Timbren Axle Less Kit # T99GR which is a 5,200 lb Timbren Axle Less kit and then for matching hub drums that have the bolt pattern you need is the part # 8-201-5UC3-EZ and then for brake assemblies # AKEBRK-7-SA are a fit as well so you'd be set.
    view full answer...
  • What Parts Do I Need to Install the Timbren Axle-Less Trailer Suspension # T99GR?
    Hello Andrew, Time to make the switch to Axle-Less, you won't regret it! The Timbren Axle-Less Trailer Suspension System - 4" Lift Spindle - Off-Road Tires - 5,200 lbs # T99GR will work with the Easy Grease Trailer Hub and Drum # AKHD-655-6-EZ-K, and the etrailer Electric Trailer Brakes # AKEBRK-7-SA. Our hubs do come pre-greased but it does not hurt to have some extra grease on hand so you might want to grab some LubriMatic Prime Guard High Temperature Wheel Bearing Grease # L11380. You...
    view full answer...
  • Can I Mount A 5 Lug land Cruiser Wheel To The Timbren 5200lb HD Axle
    The only hubs that are compatible with the Timbren 5200lb HD Axle like part # T99GR are going to be 6 lug hubs like the # 8-213-5UC1-EZ. We do not offer any 5 lug hubs compatible with this axle, so there is not going to be a way to mount a 5 lug Land Cruiser wheel on this axle. Our recommendation is to go with different wheels, like the Dexstar Steel Mini Mod Trailer Wheel # AM20746, which is a 16" silver 6 lug trailer wheel.
    view full answer...

Do you have a question about this Trailer Axle?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Steven C
Installed by:
Steven C
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Ryan F
Written by:
Ryan F

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