1. Trailer Leaf Spring Suspension
  2. Timbren
  3. Axle Replacement System
  4. Axles
  5. Universal Fit
  6. 3500 lbs
Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2

Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2

Item # A35RD545
lowest price pledge
Our Price: $779.71
Trailer Leaf Spring Suspension
This item qualifies for Free Shipping
Shipping Weight: 112 lbs
Quantity: 
A35RD545 - Universal Fit Timbren Axles
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

Need help with installation?
Locate installers near me
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. The 4" drop spindle allows for a low deck height. Fits any frame width. Lowest Prices for the best trailer leaf spring suspension from Timbren. Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2 part number A35RD545 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (190)
  • Q & A (29)
  • Photos
  • Why etrailer?

Timbren Trailer Leaf Spring Suspension - A35RD545

  • Axle Replacement System
  • Axles
  • Universal Fit
  • 3500 lbs
  • 5 on 4-1/2 Inch Hub
  • Timbren

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. The 4" drop spindle allows for a low deck height. 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" Drop, EZ Lube spindles with hubs accept any 5-bolt wheels with regular tires
    • 4" Drop provides lower ground clearance
    • Spindles can be easily removed from units for simple replacement if damaged
    • Bearings, races and seals are included with hub
  • 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 regular tires
    • Not recommended for triple-axle applications
  • Bolt pattern: 5 on 4-1/2"
  • Weight capacity: 3,500 lbs
  • Quantity: 2 suspension units with hubs
  • Spindle/Hub compatibility:
    • Bearings: L68149 inner, L44649 outer
    • Races: L68111 inner, L44610 outer
    • Seal: 10-19
  • 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 standard, 2-inch steel tubing to connect the 2 Timbren suspensions together using the built-in square 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-inch holes make it easy to reinforce your trailer's frame by adding standard, 2-inch-square 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. And the low deck height makes it easy to load cargo from either the rear or the side.


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" drop 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 accepts any 5-bolt wheel that has a low-pressure, regular tire.
  7. The built-in square hole accepts standard 2-inch tubing. If there is no crossmember above the suspension, you can easily add support to your trailer's frame by inserting 2-inch 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-square 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 sandwiches 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

Dimensions 1

Dimensions 2

Dimensions 3
Dimensions 4


A35RD545 Axleless Trailer Suspension System by Timbren - 4" Drop Spindle - Hubs with 5 Studs on 4-1/2" Bolt Circle - Regular Tires - 3500 lbs

ASR3500S04 Timbren Axle-Less 3500S, P019 Outboard Arm 4" Drop Spindle w/ Brake Flange

88545_2 3500 lb Idler Hubs - 545 1/2" Stud - Qty 2






Customer Reviews

Timbren Axle-Less Trailer Suspension System w Hubs - 4" Drop Spindle - 5 on 4-1/2 - A35RD545

Average Customer Rating:  4.7 out of 5 stars   (190 Customer 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. The 4" drop spindle allows for a low deck height. Fits any frame width.

- A35RD545
by:

enclosed are pics of trailer and spindle units. I was very happy with the end result, lowering ez loader trailer 8 inches for hovercraft. the spindle units were well made, very strong but had some weld repairs as pictures show.i could not set the needed adjustments till I cleaned up the units with a stone and file. also please improve the packaging . these heavy units need something better than cardboard for shipping. they were dislodged from Styrofoam and partially poked holes thru cardboard. but fortunately no damage there. again im happy with the installation.thank you!!!



- A35RD545
by:

Good heavy duty product


Comments
Axles work great
Jason m - 08/13/2016



- A35RD545
by:



- A35RD545
by:



- A20RS545
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


I used these axles in a different way than most would. I needed a trailer that was small, could handle tight switch-backs, carry 600 lbs and be light. I had this idea and as a retired design engineer I saw a great possibility in this axle. I have made four of these trailers now, one as a camp trailer, 2 for trail work for State Parks and one as a utility trailer.


Comments
Really cool work!
-- Etrailer Expert Sierra K - 07/07/2021


- ASR3500S06
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


The trailer rides great down the road and no more worries about saltwater and rusty leaf springs. Not a cheap option but I’m very happy with the setup. When installing, just be sure to measure accurately and have sharp drill bits. A drill press type of guide also helps ensure correct drilling angles. The first picture is of a mounting gusset a local welding shop made. One is needed for each side and necessary to provide needed mounting strength-at least on my trailer frame. Pics 2 and 3 show the mounted suspension on one side of the trailer. Pic 4 shows the suspension on one side of the trailer with the axle attached and a separately purchased disc brake assembly mounted on it. Finally, pic 5 shows a 2” box channel between both suspension assemblies. Independent suspensions would have been nice, but I wanted to ensure trailer rigidity was maintained. So, after one year, so far, so good. It’s all smooth sailing down the highway.



- TASR5200S03
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Very exicited about these axels, I have been eyeing these for over a year. (Excellent service from etrailer, they had my parts to me in 1 day from the time of placing the order.) These axles seem to be well made and fit nicely with the Dexter hub and drum assembly and the 12" electric brake kit. I installed this all on a M1101/M1102 trailer frame after removing the factory axel assembly. I have not ran these on the road or off as of yet but will give another review at that time. The fit and finish are great and the packaging was good, a little banged up from shipping (missing 1 washer)



- ASR3500S06
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


A must have suspension if you're building an off-road trailer!


Comments
Its been a year and this suspension is still doing great!
David R - 09/27/2021


- TASR5200S03
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


This is as close to a bulletproof suspension as they come. We use this suspension on all of our VORSHEER XOC trailers. They have performed flawlessly as an off-road suspension.



- ASR3500S05
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Trailer suspension and disk brake performance is outstanding big big difference over leaf spring and electric drum brakes. Installation required modifications to the frame to monut the timbren suspension



- ASR3500S05
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Timbren saved our RV road trip! The leafs on the axle on our 2018 Jayco TT came apart while driving in Maryland. We tried going to the manufacturer, but they were useless. Going to a RV mechanic meant being grounded for at least 2 months. Then we found Timbren. With the help of Timbren's excellent staff we purchased axle-less system through etrailer, who made sure we got as quick as possible. It came ahead of schedule, my husband installed the Timbren system and we were back on the road! The axle-less system is better than the original manufacturers. If you plan on taking your RV or TT farther than 100 miles GET THIS INSTALLED and get it through etrailer.



- A35RS545
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


I rebuilt a 4 x 8 trailer using the Timbren Axle-Less Trailer Leaf Spring Suspension and it works great. I would recommend it to others.


Comments
Working out just fine.
David J - 09/25/2020


- ASR3500S06
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Best suspension you can get for off-road trailers. We use this suspension on all of our VORSHEER XER trailers.



- A12WS545
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Purchased 2 sets of the Timbren 1200 Axle-less systems for upgrading the suspension on an older 30' ft glider trailer. Single axle with small (13") tires made towing tough due to porpoising, dragging on drive entrances do to poor flotation; also German made and metric, no repair parts. GVW 2000 lbs equated to bouncy ride. Dual sets now allow the trailer to ride over bumps and sharp inclines easily, smoothly, little bounce on country roads; porpoising is history. My glider now rides securely, safely, quietly. Install time 4 1/2 hours (includes head-scratching). Results are outstanding, units are totally solid. Recommend the square tube interconnect, easy and quick - trailer frame was on the light side, so a precautionary fix. Clean look underneath. Ordered 5 wheels w/tires, very nice. Helpful neighbor so impressed he ordered a HD single set for his new DIY snowmobile trailer. Customer satisfaction 100%, from phone order, online support, product information, immediate shipping, install instructions, followup... HIGHLY RECOMMENDED!


Comments
I have just a little more to add regarding my purchase: Two sets, of the Timbren Axle-less assemblies, 1200 lb, and 5 wheels. I placed the order via phone, and whoever was on-call that day provided great answers and recommendations regarding the units, wheels and tires. At 31 feet, the trailer originally exhibited amplified porpoising on any bumps or dips in the road. Also bouncing and occasional sideways tipping due to the single axle. It made a lot of noise on my mountain community washboards. I speculated that the Timbren units would solve most, if not all of these problems and they have. Installation on my older 31 ft European ie, metric and no longer manufactured glider trailer was a mere 4.5 hours from removal of the old single axle to setting the trailer back down on its new assemblies. Instructions are complete, precise, useful and helpful. Appreciated. Little to comment on as installation was all straight-forward. I would like to describe the maiden voyage to the airport and back, but there is nothing to tell, other than it towed beautifully proper alignment instructions, and all that I viewed from the rear view mirror looked like a magic carpet ride. It rides over washboards and pot holes like a marathon hurdler, the 4-wheel independent suspension is great. Packaging: the shipping boxes all arrived in good condition, but the cardboard component boxes inside them... not so much. Most were ripped and open due to heavy components lightly surrounded with brown packing paper, just token amounts. Parts: all was accounted for minus a pair of spindle axle washers for one set, easily replaced at the local farm and ranch supply. No squawk, just an fyi. I am very pleased with your product and support, and was happy to leave a 5-star review with photos. The upgraded suspension was also a topic this past weekend at the glider port by those who regularly trailer their ships to various soaring events, some as far as a thousand miles away. My compliments to eTrailers, hope you can use my info,
-- comment by: Kelly F - 11/28/2018



- A4WS440
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Pleased with ETRAILER, will order here again. Not as happy with the torsion axle setup. 2 inch square opening for tying both axles together with your own 2" square tubing are not shaped to match 2x2x1/8 tubing. Grinding and welding of tubing required to make it fit. Also found the overslung stub axle left the end of the pivot arm without much ground clearance though the unit was intended and spec'd for atv tire off road use. A pivot arm with mounting pads top and bottom would be better and allow the user to choose high or low clearance use. I found the units were perfectly suited to offroad use once I fabricated new mounting pads and welded them to the bottom of the arms.


Comments
After a year of off road use, I couldnt be happier. My trailer rides smooth loaded or unloaded. No of that bunny hopp with leaf springs or rigid mount axles. The small rebound control snubber works perfectly! I modified my components for high clearance but the concept is sound, they work well. Great job Timbren!
Doug F - 06/22/2017



- ASR1200S04
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


The order came in on time and the customer service at etrailer.com (Ashley) and Sean from Tmbren was outstanding. They both were very helpful in my choosing the right product for my needs. The axle less suspension's performance is absolutely superb. It vastly improves ride quality. I am using it on a teardrop camper that often goes on gravel roads and the raddling sound from the leaf axles was horrible. A couple of points to consider before you settle on the axle less suspension: keep in mind that you will lose some hight of the trailer. While you will gain clearance from the lack of the axle, the suspension will make the trailer sit lower than before.i had to lower my hitch by an inch to maintain the trailer leveled. Also it does appear to compress at higher rate than the leaf springs, which makes it softer but easier to reach it's limit. Overall this product is absolutely a must if you are looking to improve the safety and the quality of your towing.



- ASR1THDS01
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


After a great deal of research, I ultimately chose the Timbren long arm kit to replace the torsion axle under my teardrop trailer. My initial impression is that there is simply no comparison between the two. It now rides better, pulls better and handles better than I could have imagined. The Timbren axle system is incredibly well built and is much more confidence-inspiring. While the spring rate closely matches my trailer weight, the components are much more rugged and robust. The spindles, bearings and brakes are rated at double the capacity of my old axle which gives me great peace of mind. I pull my trailer, both on and off road, anywhere it will fit and the long travel and heavier components are a game-changer for my travels. Installation, while requiring a bit of forethought, was otherwise straightforward and methodical. Documentation available from etrailer and Timbren, is second to none. Instructions were clear and concise with drawings and detail taking the major guesswork out of the equation. Even though, due to the odd frame design of my trailer that required a bit of work to adapt, I ended up making some frame stiffeners, the adaptation was as simple as it could possibly be. I've ordered from etrailer in the past and they were 100% accurate on this order as well. I ordered the Timbren kit without backing plates and hubs due to the requirements of my trailer and etrailer suggested, explained availability and supplied all of the components I needed. They truly a stress-less bunch of folks with an extraordinary website. I'll no doubt turn to them again...



- ASR1200S02
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


It was a very straight forward install, it goes pretty smooth if you take your time, double check your layout, Make sure of your bolt sizes (length) before going to the store. If you plan the project, don’t rush, its not a race, it goes really good. I spent about 10 hours spread over two days by myself. I am just waiting for tires to arrive. All that said very happy with the product and etrailer. Will recommend for any axel/suspension replacement.



- ASR3500S06
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Came late. Not e-trailers fault. Covid-19 and China's fault. They bolted right up on my trailer frame. Really like the way they make my tear drip trailer handle. No sway, no bouncing all over like it use to. Will always put these under any trailer I build from now on. E-trailer keep up the great work.



- A20RS545
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


This suspension system did EXACTLY what I wanted. I replaced the leaf springs, axle/hubs on my small trailer. The new suspension improved the capacity, lowered the bed 4+inches, improved ground clearance and allowed me to rebalance the trailer all WITHOUT having to have any welding done. Everything needs to be measured very exactly and the alignment technique is fairly cumbersome and takes a bit of time. In the end, I have a quiet, steady, strong, low riding trailer. What more could you ask for



- A20RS545
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


These units install easily, are well made, and perform great! The trailer doesn't bounce around like you see a lot of trailers do while traveling down a bumpy road. I traveled some unpaved roads with no issues. I am certainly glad I went axleless. I installed with 15" tires. Problem is I didn't go big enough. I intended to install on an existing trailer that I had. Changed my mind and built a new trailer. The new trailer came in heavier than I had planned. 2k pound capacity is now too small. I have to watch what I load the trailer with so I don't over load the suspension. I intend on buying the 3500 pound units when I have the money.



- ASR3500S06
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


We use Timbren's ASR3500S06 on all of our XER trailers. We couldn't be happier. It is a well built suspension.



- A12WS545
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Good product and easy to install on my new build of a off road trailer for my side by side. Thanks


Comments
This has been a great product and works great and was easy to install
John V - 04/14/2020


- TASR5200S03
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


We use Timbren's ASR5200S03 on all of our XOC and XOC-R trailers. These suspension are well built and have always performed well for us.



- ASR1THDS03
by:

Review from a similar Axle-Less Suspension in Trailer Leaf Spring Suspension


Hello I just received my order today that I only placed on Wensday. That night at 7:30 pm. I received an email stating your order is ready for shipping! I received my order on Friday WOW FAST FREE SHIPPING. Great product fast shipping. I'm going to start building OVERLAND TRAILERS.


Comments
Fantastic O will ONLY use Timbren Axles on my Overland Campers
Robert - 03/07/2021

Comments
Fantastic O will ONLY use Timbren Axles on my Overland Campers
Robert - 03/07/2021

69
252
Show More Reviews

Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Timbren Axle-Less Suspension System for Snowmobile Trailer 2,990 GVWR
    Since your trailer has almost a 3,000 lb GVWR you'd want a Timbren kit that has the 3,500 lb axle capacity like the part # A35RD545 which has the 5 lug bolt pattern and also has a 4 inch drop which a lot of the snowmobile trailers do well with since a lot of them are lowboy trailers. Or we have the straight axle if you didn't want the drop with the part # A35RS545.
    view full answer...
  • Trailer Height When Using Timbren Axle-less System with 4 Inch Drop
    The exact height of the deck will depend on other factors with your trailer. However, I can tell you that the spindles of the Timbren Axle-less System # A35RD545 sit pretty much at even height as the location where they connect to a trailer's frame. Knowing that, if you know the tire size you'll be using and divide it in half you'll know the height the spindles will be off the ground. We can factor in that the weight of the trailer on the Timbrens will cause them to ride slightly...
    view full answer...
  • Will the Timbren Axle-Less Suspension System Work on an Aluminum I-Beam Boat Trailer
    You may be able to use the Timbren Axle-Less Suspension System, # A35RD545, on your aluminum boat trailer as long as you can find a way to bolt it to the frame. The frame brackets for the Timbren Axle-Less systems bolt to the outboard side and bottom of the frame rail. You will need to weld an aluminum plate to the outboard side of the frame for the side bolt holes and you will want to make sure the bolts for the bottom of the frame will not hit the center web of the frame. The underside...
    view full answer...
    Image 1 for
  • Can Timbren Axle-Less Trailer Suspension System be Used in Place of Torsion Axles on Travel Trailer
    Yes, you could use the Timbren Axle-Less system # A35RD545 in place of straight axles on your travel trailer. This system basically works similarly to torsion axles with the suspension built in. Since this system is rated for 3,500 pounds though you would likely notice a stiffer ride since the trailer will not weigh enough to compress the suspension the way it does with the two 2,500 pound axles. I have included a link to all of the Timbren systems we carry. The system you referenced...
    view full answer...
  • Can Air Be Released From Timbren Axle-Less System to Lower Ground Clearance
    The Timbren Axle-Less Trailer Suspension Systems, like the 3,500 Pound # A35RD545 that you were looking at, feature independent AEON springs for load support. These are not air springs but durable hollow rubber springs, so they aren't something that you can adjust the air pressure for or empty out when needed to decrease your ground clearance. This particular system does have a 4" drop spindle though, which will lower the overall deck height of the trailer for easier unloading/access....
    view full answer...
  • Will a Kenda 205/65-10 Bias Trailer Tire with 10" White Wheel Fit on Timbren Axle-Less System
    Yes, the wheel and tire part # AM3H480 is going to have plenty of clearance to install on the Timbren Axle-Less Trailer Suspension System w Hubs # A35RD545. This axle system would give you 6 inches of clearance from the hub face to the frame of the trailer so the rim would have plenty of clearance to fit.
    view full answer...
    Image 1 for
  • Will 3,500 lb Timbren Axle-Less Trailer Suspension System Work With Disc Brakes
    The Timbren Axle-Less Trailer Suspension System such as the part # A35RD545 you referenced can be mounted to any trailer frame so long as there is an existing crossmember where you want to instal it, or you can install a piece of 2-inch square tubing to the frame and bolt it to that. So the short answer is yes, the Timbren system will work for you. That said, the Timbren System # A35RD545 you referenced already has hubs so if you already have hubs you will need the Timbren Axle-Less...
    view full answer...
  • Recommended Trailer Axles, Hubs, Wheels and Tires For a Custom Built Seaplane Trailer
    Due to the amount of weight you will be carrying of the seaplane I am going to base all my recommendations off a trailer that will be close to 1,000lbs. This would put the total weight of the seaplane(6,000lbs) and trailer at 7,000lbs maximum. I recommend 2 of the Timbren Axle-Less Trailer Suspension System w Hubs # A35RD545. This has a 4" drop spindle allowing you to keep the trailer as low as possible for easier launch and retrieval. It already comes with a 5 on 4-1/2" idler hub...
    view full answer...
  • Axleless Trailer Suspension for Small Off-Road Camper
    We have a Timbren Axle-Less Trailer Suspension System w Hubs # A35RD545 that will work great for your off road camping trailer. This system is rated for 3,500 lbs and will bolt right to your frame. For a tire and wheel set up you could go with Kenda Aluminum HWT S5 Black Wheel # AM31206HWTB. I think these wheels and tires would look sweet on a small camper. We also have a standard white rim and tire # LHAW120 if you would rather go that route.
    view full answer...
  • Available 3,500 lb Timbren Axle-Less System Without Electric Brakes
    There is a Timbren Axle-Less Trailer Suspension System similar to # A35RD545E but does not have electric brakes. The # A35RD545 has the same 3,500 lb capacity with a 4" drop spindle and idler hubs. The hubs have a 5 on 4-1/2" bolt pattern with inner bearing # L68149, outer bearing # L44649 and grease seal # RG06-050. I've added a link to a video review of the Timbren Suspension System for you to take a look at as well.
    view full answer...
  • Suspension and Tire/Wheel Upgrade Needed for a 3,500 lb Trailer Axle
    If you already have the axles installed then I would need to know the size of your hub as well as the bolt pattern on your hub as well to make a recommendation. I have attached a helpful article on bolt patterns for you to reference. If you don't know the diameter of your hub just let me know what the weight capacity is and I should be able to help you from there.
    view full answer...
  • Is the Dexter Drop Tube Trailer Axle Beam Offered with 64 Inch Hub Face and 3,500 Lb Capacity
    The best option I have for you is the Timbren Axle-Less Trailer Suspension System part # A35RD545 which has a built-in drop of 4" and comes with idler hubs that have a 5 on 4-1/2" bolt pattern. In regards to hub face, this can be adjusted to fit any width. The hub face measurement you are looking for of 64" is very uncommon for this axle capacity so we would not have a Dexter Trailer Axle Beam that matches this.
    view full answer...
  • Axle-Less Recommendation For Trailer With 72 Inch Frame Width
    All of the 3,500 lb axles like part # 35545E-ST-EZ-89 we offer have the center to center spring seats at 74 inches. We do not offer an axle with the seats placed at 72 inches as you mentioned. An option you may want to take a look at is to weld new spring seats like part # TRSS238, onto the new axles. You should make sure this is done by a certified welder. Another option you may wish to consider is the axle-less system like part # A35RD545E. This system will attach to any frame...
    view full answer...
  • How to Pick Spindle Drop, Lift or Straight for Timbren Axle Less System
    The style of spindle needed will be determined by what height would work the best. The drop spindles of # A35RD545 will put the axle center 1/4 inch below the bottom of the trailer frame. The 4 inch lift part # ASR35HDS02 will have that distance at 7-5/16 inch. The straight spindle part # A35RS545 will have that dimension right at 4 inches. I attached a diagram of this kit that shows the spindle height of 4 inches.
    view full answer...
    Image 1 for
  • Smallest Diameter Trailer Tire with At Least 1,800 Pounds Capacity and Parts for Building a Trailer
    Assuming the trailer is as single axle and only has two tires the smallest we carry is a 205/75-14 size tire. The Goodyear # 724864519 measures 26.14 inches in diameter and has a weight capacity of 2,040 pounds at 65 psi. You also want to make sure the wheel has enough capacity. If you can tell me your bolt pattern I can recommend a wheel as well.
    view full answer...
  • How to Select Replacement Trailer Axle
    The features you need to match up when selecting a replacement trailer axle are 1) weight capacity; 2) the hub face dimension; and 3) the spring center dimension. Please refer to the linked diagram. It sounds like you may have a torsion type axle (that does not require leaf springs) that has what is called a drop spindle, one that allows the trailer deck height to be lower to the ground. Similarly, a lift spindle does the exact opposite; it lifts the trailer height relative to the spindle....
    view full answer...
    Image 1 for
  • How to Select Replacement Trailer Hubs
    Thank you for submitting your photo of your trailer spindles. To select compatible replacement hubs that have the 5-on-4-1/2-inch bolt pattern you want you will need to match up several characteristics to your existing hubs. You will need to match the axle's capacity and also either the bearing numbers or bearing diameters, as you have provided. I was able to find only a little information about the bearings (axle cone runners) you referenced, parts 909501 and 909502. They reportedly...
    view full answer...
    Image 1 for
  • Replacement for 3,500 lb Axle on Enclosed Trailer
    We do have a fantastic option for your enclosed trailer that has a 3,500 lb axle based on my research (though you will want to verify this); however, we do not offer torsion axles. The option we do carry is going to be a better one, the Timbren Axle-Less Trailer Suspension System, which are simply bolted or welded so you do not have to worry about finding an axle that meets any specific measurements. They also offer you an improved ride compared to a traditional through-axle because...
    view full answer...
    Image 1 for
  • Recommended 3500lb Timbren Axle-Less W/ 4" Drop For 3000-3300lb Horse Trailer
    Thanks for all of the information! The products you were looking at are all compatible. Starting with the Timbren Axle-Less Suspension I would go ahead and use the # A35RD545 as it has the 3500lb rating which will be perfect for your intended trailer weight, and already includes the 5 on 4-1/2" bolt pattern hubs that you were wanting. The # ASR3500S04 is the exact same spindle just without hubs, and would work perfectly with the # CE13515 you mentioned, but there is not really...
    view full answer...
  • Replacement Idler Hubs for Antique Home-Made Trailer with 3500-lb Axle
    All of the idler hubs we offer for 3500-lb axles use the same bearing set, L68149 and L44649, and in fact none of the idler hubs we sell have the bearings used in your existing hubs - please see linked page. This means that you will need to have a professional welder change out your spindles - or instead do what I suggest - change out your axle entirely. Since your trailer is "antique" there is an obvious safety benefit to replacing the entire axle/spindle/hub assembly. You will also...
    view full answer...
  • 3,500 lb Timbren Axle-Less Suspension System With Drop For Small Camper
    It sounds like what you are needing is a Timbren Axle-Less Suspension System that has a drop spindle on it in order to have a low clearance to fit in your garage. We do have options for you, both of which have a 4 inch drop, 3,500 lb capacity and come with either an idler hub or a hub and drum. - Timbren Axle-Less Trailer Suspension System with Hubs - 4" Drop Spindle # A35RD545 - Timbren Axle-Less Trailer Suspension System with Electric Brake Hubs - 4" Drop Spindle # A35RD545E I...
    view full answer...
  • Which Timbren Axle-Less Suspension for 3500lb Capacity Low-Deck Car Hauler
    The Timbren Axle-Less suspension system is a good choice. They offer a 4 inch drop spindle model, part # A35RD545 includes idler hubs and # A35RD545E includes electric brake hub drums. These are good for a total 3500 lb capacity, which includes the weight of the vehicle and the trailer. This would be a good option for a car carrying trailer with a low deck height. At rest, the center of the spindle would sit even with the bottom of the trailer frame, and at maximum deflection, the center...
    view full answer...
  • Timbren Axle-Less Suspension System to Lower Trailer Deck Height
    There is a safe and effective way to lower your trailer height, Timbren 3500-lb Axle-Less Suspension Kits like # ASR3500S04. This bolt-on kit completely replaces your beam axle, leaf springs and hangers and it is designed with 4-inches of drop in the spindle height. You get lower deck height without compromising ground clearance and also a fully-independent suspension! Please check the linked video for more details on these Timbren suspension units. The easiest install method uses 2...
    view full answer...
    Image 1 for Image 2 for
  • Best Option For Low 3,500 lb Axle Suspension
    Thanks for the drawing, and I think we may have an option for you here, though there isn't a traditional through-axle that can work for you with those dimensions. The reason for that is for a standard 3,500 lb through-axle, the shortest you will find is 89 inches from hub face to hub face, which is quite a bit further than the 70 inch width you have so the wheels would stick way out. So instead I the Timbren Axle-Less Suspension System, which are simply bolted or welded so you do not...
    view full answer...
    Image 1 for
  • Available Timbren Axle-Less Suspension System Rated For 3,500 Pounds
    We have two Timbren, 3,500 pound systems with idler hubs, the Timbren Axle-Less Trailer Suspension System with Hubs - Strait Spindle - 5 on 4-1/2 # A35RS545 and the Timbren Axle-Less Trailer Suspension with Hubs - 4 Inch Drop Spindle - 5 on 4-1/2 # A35RD545. Both of these systems are designed to mount wheels that have a 5 on 4-1/2 bolt pattern. Both the # A35RS545and the # A35RD545 have 3,500 pound weight capacities and feature EZ-Lube Spindles. When choosing tires and wheels for...
    view full answer...
  • Availability of Trailer Axles with Drop
    The dropped axle option is the single most popular option for tiny house trailers made by tinyhouse basics, according to their website. This feature allows a 4-inch lower deck height for more interior headroom and easier entry. We do offer the axle-less Timbren trailer suspension kits that offer drop. Examples include the 3500-lb-rated Timbren kit # A35RD545E which features electric brakes with 5-on-4-1/2 hub/drums and the idler hub kit # A35RD545. These suspension kits bolt (or weld)...
    view full answer...
  • Recommended Timbren Axle-Less Suspension to Replace Lippert 3500 lb Capacity Axle
    The numbers you provided confirm that you have a Lippert 3500 lb axle. Lippert couldn't tell me if if was a straight, a drop (which raised the trailer) or a lift (which drops the trailer) axle. Here are the available options. • For a straight spindle, use # ASR3500S05, or # A35RS545E which includes brake assemblies and hub/drums or for the same assembly but with idler hubs, use # A35RS545 • For a 2 inch lift spindle, use # TASR35HDS07 • For a 4 inch lift spindle, use # ASR3500S06 •...
    view full answer...
  • Recommended Axle-Less Trailer Suspension With Drop Spindle For Older Coachman Camper
    We have axle-less systems that are designed with a drop spindle but we do not offer a standard axle with a drop as you said you have on your trailer. We Have axle-less systems like part # A35RD545E that has electric brake hubs and has a 4-inch drop spindle. The bearings, races, and seals are included and the wheel bolt pattern is 5 on 4-1/2. For an axle-less system with idler hubs and a 4-inch drop spindle I recommend part # A35RD545. Both of these systems have a 3,500-lb weight...
    view full answer...
  • Complete Axle-Less Suspension And Electric Brake Setup For 1990 Aliner Camper
    I do have a solution for your axle. It looks like you have a torsion axle on your 1990 Aliner Camper, which we do not carry. I recommend going with an axle-less suspension setup. This will replace your current axle and suspension. If you are wanting a 3,500lb rated axle then you can go with Timbren Axle-Less Trailer Suspension System Straight Spindle # A35RS545 or go with Timbren Axle-Less Trailer Suspension System 4" Drop Spindle # A35RD545 which has 4" drop for lower ground clearance....
    view full answer...

Do you have a question about this Trailer Leaf Spring Suspension?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer leaf spring suspension for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer leaf spring suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee David L
Written by:
David L
Employee Randy B
Installed by:
Randy B
Employee Amanda M
Updated by:
Amanda M
Employee Zach D
Video by:
Zach D

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. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 800-298-1624