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 Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs

Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs

Item # A35RD545E
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Our Price: $1,025.20
Trailer Leaf Spring Suspension
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Shipping Weight: 159 lbs
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Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs 3500 lbs A35RD545E
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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. 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 Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs part number A35RD545E can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (158)
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Timbren Trailer Leaf Spring Suspension - A35RD545E

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

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 electric brake hubs and assemblies accept any 5-bolt wheels with regular tires
    • Electric brakes offer more control than hydraulic brakes
      • Requires an electric brake controller (sold separately)
    • 4" Drop provides lower ground clearance
    • EZ Lube feature makes it easy to grease bearings without removing the hub
    • Spindles can be 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 electric brake 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 is simple to grease. If damaged, it can be removed and replaced, saving you both time and money.
  6. The electric brake hub (standard model hub shown) accepts any 5-bolt wheel that has a 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 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

Dimensions 1

Dimensions 2

Dimensions 3

Dimensions 4

A35RD545E Axleless Trailer Suspension System by Timbren - 4" Drop Spindle - Electric Brake Hubs - Regular Tires - 3500 lbs

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

94545_LH 3500 lb Electric Brake Hub LH 545 1/2" Stud

94545_RH 3500 lb Electric Brake Hub LH 545 1/2" Stud






Customer Reviews

Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs - A35RD545E

Average Customer Rating:  4.7 out of 5 stars   (158 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.

- A35RD545E
by:

The suspension looks very high quality. I was kept informed where the parts were from the time I ordered until They showed up at my door.



- A35RD545E
by:

I ordered Timbren axles from etrailer and was extremely satisfied. They were a. Couple bolts short but sent a whole package in a couple days .Quality of parts and customer service was extremely good!!! Thanks, Robert and Alexis



- A35RD545E
by:



- A35RD545E
by:

Extremely good product. Rides much better than traditional leaf springs. Ordering. A 7,000lb 8 lug set for the big trailer.



- A35RD545E
by:

Exactly what I was looking for. And the shipping was amazingly fast. Ordered on a Sunday I received it Wednesday!!! Tracking was easy your site is user friendly, easy to order and track orders. Best prices anywhere



- 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)



- 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.



- 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



- 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


- 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...



- 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


- 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.



- 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


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.



- 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.



- ASR1200S02
by:

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


I have an old sears game fisher trailer that was modified to fit my 12' Livingston, and you can't find parts to fit those old hubs, etc. so I switched it over using the Timbren system. Installation was a breeze for me and a friend, less than 3 hours total time using regular garage tools, and I couldn't be happier with the results. I went with a square bar instead of "boxing in" the hub members as it was easier and less work. I'd recommend the Timbren Suspension to anyone...



- 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


- 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



- ASR3500S04
by:

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


Very nice quality, I had to call Timbren with a question very good company to deal with and etrailer is a first class company very good customer service.



- A35RS545E
by:

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


Products were delivered exactly as described. The tracking information and communication during the ordering process was also above expectations. I’d order from etrailer again.



- A20RS545
by:

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


I am not a mechanic so Brandi was real helpful. Had to get some professional help to remove the old suspension and install the new suspension. The only drawback we ran into was the spindle did not extend out far enough to mount the tires in the normal way. We had to put the tires on backwards. It all worked out beautifully. Towed the trailer for over 1700 miles without any problems. Brandi was delightful to talk with and very patient with me. Her help was most appreciated. Sorry, I didn't take any pictures.



- A20RS545
by:

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


Installed these axels on Custum boat trailer to fit on top of our Jeep... worked perfectly Thanks



- TASR5200S03
by:

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


The perfect application for my custom p roject...



- A35RD545
by:

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


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!!!


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Ask the Experts about this Timbren Trailer Leaf Spring Suspension

  • Availability of Timbren Axle-Less Suspension System With Hydraulic Brakes with 4000-lb Capacity
    Both of the Timbren Axle-Less suspension systems with brakes that we offer have a 3500-lb capacity and both also feature electric brakes, not hydraulic brakes. Part # A35RD545E is a kit with 4-inch drop spindles and part # A35RS545E has straight spindles. Neither of these would have the capacity you need for your trailer. We do offer a Timbren system rated for 5200-lbs, part # ASR5200S01, which includes 5-bolt brake flanges. With these you could use hydraulic brake assemblies # 23-325...
    view full answer...
  • Using Hydraulic Trailer Brakes on Timbren Axle-Less Suspension 3500 Pound Axles
    What you would need is a Timbren Axle-less suspension system that just has spindles, # ASR3500S04. Then you could add the appropriate hydraulic brake assemblies, 4-bolt mounting pattern, and matching drums. The hub and drum assemblies used will need to use inner bearing L68149 and outer bearing L44649. I have included a link to the brake assemblies that you can use. For a hub and drum assembly that works with the EZ lube spindles on the Timbren system you can use # 84546UC3-EZ. If...
    view full answer...
  • Mounting Dimensions of the 3,500 lb Timbren Axle-Less Suspension System # A35RD545E
    I have attached a top view photo with additional dimensions that should be helpful. As you may already know, this system will have 1-3/4 inches of deflection under a full load. If you are using fenders, I recommend placing the fenders 3 inches above the tires at full deflection for maximum bump clearance.
    view full answer...
    Image 1 for
  • Availability of CAD Diagram for Timbren Axle-Less Trailer Suspension System # A35RD545E
    We do have engineering diagrams for the Timbren Axle-Less Trailer Suspension System # A35RD545E that you referenced, and we do show these on our product page. If you scroll down a bit you'll find several measured drawings of this system with dimensions and mounting points. I have also linked one of these images for your review. This kit installs either by welding or bolting to your trailer frame and two sets can be used for a tandem-type application (but not three). Included are built-in...
    view full answer...
    Image 1 for
  • Recommendation To Replace Straight Axles On Trailer For Lower Ground Clearance
    Since your straight axles are too tall for your application, you can use shorter hangers for your current axles and springs. If that won't get you the clearance you need, I recommend replacing your axle with the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs # A35RD545E. This will give you the suspension, brakes, and lower your trailer. If you need a larger capacity let me know. This system has EZ lube spindles and the 4 inch drop provides...
    view full answer...
  • Can Disc Brakes be Added to the Timbren Axle-Less Suspension Systems
    The 3,500 lb weight capacity of the Timbren Axle-Less Trailer Suspension System, # A35RD545E, is the weight capacity for the pair, not per side. Disc brakes can be used with the Timbren Axle-Less Suspension systems, however, Timbren does not offer an axle-less suspension kit with disc brakes. If you want to use disc brakes, I recommend buying the Axle-Less Suspension System - 3,500 lbs, # ASR3500S04, and the Kodiak Disc Brake Kit - 3,500 lbs, # K2HR35D. Buying the Timbren Axle-Less...
    view full answer...
  • Can Timbren Axle-Less Systems be Used In Tandem for a Tandem Axle Trailer
    Yes, you can use Timbren Axle-Less Systems like the part # A35RD545E that you referenced for a tandem axle setup. You cannot use this setup for a triple axle though.
    view full answer...
  • Axle Recommendation for Building Low Profile Utility Trailer
    Having a deck height for a trailer of 13-14 inches is pretty low. Using the 4 inch drop Timbren setup part # A35RD545E would give you the best chance of it getting that low. The center of the spindle will end up being 1/4 of an inch below the trailer frame when installed. So depending on the size tires you use and the other dimension of the trailer it would be technically possible. I attached a dimensional drawing for the setup for you to check out as well.
    view full answer...
    Image 1 for
  • Replacement Travel Trailer Axle For Square Drop Axle
    Thanks for the picture. The square axle you have also has a drop to it. Based on spring to spring measurement and the drop needed, we only have one good option for your axle, but it will include the electric brakes and the suspension you need so the leaf springs will be replaced with another option. For your application, I recommend either the Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs - 4" Drop Spindle - 3,500 lbs # A35RD545E or the straight spindle # A35RS545E...
    view full answer...
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  • 3,500 lb Axle With 5 on 4-1/2 inch Bolt Pattern Hubs and 4 inch Drop Spindles
    Yes we do. It's not a standard axle but it fits all of the criteria you are looking for. Check out the Timbren Axle-Less Trailer Suspension System with Electric Brake Hubs # A35RD545E. This has a 3,500 lb capacity, has brake hubs that have 5 on 4-1/2 inch bolt pattern and has drop spindles that give it 4 inches of drop.
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  • What To Do With A Bent Torsion Axle
    This would all depend on where the bend is located. If the torsion bar that connects the frame brackets together is bent, then you would need to buy a new axle. However, if the spindle on the torsion axle is bent, you can replace it. To prevent other malfunctions, I recommend using one of our Timbren Axle-Less System systems as they work independently of one another in addition to being an easy replacement option for most torsion axles. I have attached a list of all our Timbren systems...
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  • Troubleshooting Squealing Trailer Brakes
    You could have drum brakes or disc brakes on your 2008 Forest River Wildcat trailer. Which if you have disc brakes it could be that you need to put the brake pad lube on the pads. I wish we carried this but we do not. Auto parts stores should have this. For drum brakes typically squealing is caused by dust in the drums. The solution would be to remove the drum and clean the assemblies. Cheap brake linings can cause this problem as well.
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  • Timbren Axle-Less 3500-lb Suspension System for Off-Road Teardrop Trailer
    We offer two Timbren axle-less systems rated for 3500-lbs, part # A35RD545E which has spindles with a 4-inch drop, and part # A35RS545E which would be better for your application since it will not reduce your ground clearance. For off-road use you do not want to use a kit that has drop spindles; this type is better for a ramped trailer where you want a low deck height. Kit # A35RS545E includes the frame-mount suspension assemblies, E-Z Lube spindles with 4- bolt brake flanges, hub/drums,...
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  • Wheel and Tire Recommendation for a Timbren Axle Less System A35RD545E
    Since the hub drum that comes with the part # A35RD545E that you referenced is designed for 10 inch brake assemblies a 10 inch wheel would not fit it. Instead you would have to go with a 13 inch diameter rim/tire like the part # AM31985. This would be the smallest diameter wheel/tire we could recommend at 24.1 inches.
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  • Weight Capacity of the Timbren Axle-Less Trailer Suspension System # A35RD545E
    Each of the two hub/suspension assemblies in the Timbren Axle-Less Trailer Suspension System # A35RD545E is rated for 1750-lbs, so together they offer capacity equal to a standard 3500-lb axle. This system can be used to configure a tandem-type trailer if two sets are used. It is not recommended to use three sets to mimic a triple axle suspension. Timbren also offers two higher-rated 5200-lb-capacity systems, part # ASR5200S01 and part # ASR5200S04 with 4-inch drop spindles and brake...
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  • Tire Clearance on Fabricated Trailer Using Timbren Axle-Less Trailer Suspension # A35RD545E
    The overall diameter of a 15-inch tire will range from 27.1-inches for a 205/75-15 size to 28.4-inches for a 225/75-15 size. The linked article offers a table with tire dimensions. The standard deflection of the Timbren 3500-lb system # A35RD545E with a static load (sitting still in the driveway) is 2-5/8-inches according to my contact at Timbren. It was suggested that to this you add several more inches of clearance to allow for the effects of bumps. You will need to use the overall...
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  • Distance from the Spindle to Trailer Frame when Installing a Timbren Axle-Less System a # A35RD545E
    For the Timbren Axle-Less Trailer Suspension System Drop Axle # A35RD545E the distance from the center of the spindle to the bottom of the trailer frame will be right at 4 inches. The Timbren Axle-Less Trailer Suspension System w Electric Brake Hubs Straight Axle # A35RS545E would be 1/4 of an inch.
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  • 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...
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  • Timbren Axle-Less Suspension System for More Ground Clearance on a 2015 [email protected] Trailer
    The Timbren Axle-less systems are ideal for situations like yours where ground clearance is important and customers have had a lot of success using them for this purpose. Regarding the type of system though you would want to look at ones that have a lift spindle. The lift means the trailer will be higher up. Ones with a drop spindle will lower the height of the trailer. For a 3,500 pound model with a 4 inch lift # ASR3500S06. This model does not come with the hub and drum assemblies...
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  • Can Timbren Axle-Less Suspension be Added to a Trailer with a Straight Axle
    You can add a Timbren axle-less suspension system to your trailer but you have to choose one carefully so that the tires hang at the same height as the regular axle. You will also need one that has the same capacity as the axle now so that there is little to no difference is the suspension. You can put the system forward or rearward of the existing axle but it will depend on where the additional weight is going to be and how long the trailer is. I have included a picture with a formula...
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  • How to Choose a Timbren Axle-Less Trailer Suspension System
    Yes, we do stock the Timbren Axle-less suspension systems such as # A35RD545E. What I would need to know first is if you want a system that comes with hubs or hubs and drums, or if you want one that just has spindles to reuse hubs or hub and drum assemblies. If you want one that has hubs and/or drums then I would need to know the bolt pattern of the wheels you have. I linked a help article to the right explaining how to measure for bolt pattern. If you want a system that is just spindles...
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  • Will Timbren Axle-Less System Allow Lower Deck Height on Trailer?
    There is a Timbren Axle-Less Suspension System which will allow you to lower your deck height, though it won't give you quite the amount you are looking for. The Timbren # A35RD545E has a 4 inch drop spindle so it will lower your deck height by that much. This system comes with electric brakes and hubs with a 5 on 4-1/2 bolt pattern. You would be able to use a wheel and tire combination such as the Taskmaster # AC14R45SM which have 14 inch wheels and a total diameter of 26.1 inches. I've...
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  • Timbren Axle-Less Suspension for a Deck Over Enclosed Trailer
    As long as there is the proper space on the trailer frame, you can install a Timbren Axle-Less suspension system such as # A35RD545E. I have included a picture that shows the relevant mounting dimensions and bolt pattern so you can determine if it is going to work with your trailer design.
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  • How to Measure to Determine Wheel Bolt Pattern
    You can refer to the linked article for illustration of how to measure a hub's bolt pattern. If there is an ODD number of lugs, as with a 5-on-4-1/2-inch wheel, measure from the center of one lug to a point halfway between the two lugs directly opposite on the bolt circle, as shown in the linked photo. The Timbren axle-less suspension kit you referenced, part # A35RD545E, includes hubs with the 5-on-4-1/2 bolt pattern.
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  • How Far Does the Suspension Travel on the Timbren A35RD545E
    The deflection (or amount the suspension can travel), for the Timbren part # A35RD545E that you referenced is 1-3/4 inches. I attached a picture that shows this dimension as well.
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  • Do the Electric Brakes Come with Timbren 3.5K Axle-Less Trailer Suspension System # A35RD545E
    Yes, the Timbren Axle-Less Trailer Suspension System # A35RD545E does include the actual brake assemblies as well as the hub and drum assemblies. The Timbren systems are great if you're looking for a better, independent suspension for the trailer or more ground clearance beneath the trailer.
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  • Weight Capacity for Timbren Axle-Less Trailer Suspension System # A35RD545E on Tandem Axle Trailer
    Each of the two hub/suspension assemblies in the Timbren Axle-Less Trailer Suspension System # A35RD545E is rated for 1750 lbs so together they offer the 3,500 lb weight capacity. When using two systems for a tandem/double axle application, you will have a total weight capacity of 7,000 lbs.
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  • Hub Face Measurement for Tire Clearance on 3,500 Pound Timbren Axle-Less Trailer Suspension System
    The Timbren systems that include brakes do not have parking brakes. The electric drum brakes included are Axletek. The 6 inch measurement from the hub face to the hangers of the system is accurate for the # A35RD545E system you're looking at.
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  • Which Spindle Height of Timbren Axle-Less Trailer Suspension for Car Trailer
    The drop spindle model you mentioned, part # A35RD545E would be used over the straight spindle model, part # A35RS545E if you wanted a lower deck height on your car trailer. Since you are most likely already using ramps, I cannot see how you would benefit from further lowering the trailer deck height. The straight spindle model would place your spindle center about 4 inches below the mounting surface of the unloaded trailer. The drop spindle model would place the spindle center about 1/4...
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  • Suspension Travel of Timbren Axle-Less Suspension # A35RD545E
    You'd need to use a minimum of a 14 inch wheel with the # A35RD545E Timbren Axle-Less Trailer Suspension System. The brake drums recess into the wheel to a degree, and the drums wouldn't fit with a wheel smaller than 14 inches. There are brake drums that are smaller in diameter, but they wouldn't be compatible with the spindles used on any of the Timbren axle/suspension options. According to Timbren, the rubber spring allows for 1-3/4 inches of deflection. You'll want to position the...
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