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Expert Answers about Trailer Axles


  • Troubleshooting Trailer Axle Bow On Bottom
  • The axle bow as you referenced is designed to have the bow on the top so when weight is added the axle becomes more straight for best tire traction and level load support. Since your trailer axle has the bow towards the ground, I would first want to confirm the axle hasn't been damaged before just flipping it over. The spring seats should be an indicator of the way the axle was designed to function as they should be welded onto the bottom of the axle opposite the arch in the middle. ...
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  • Castle Nut Wont Thread All the Way on 2,000 lb EZ Lube Spindle with Tang and D Washer
  • Thank you for all the photos! My contact at Dexter Axle confirmed that on a 2,000 lb axle, the D-washer # 5-23 is not needed. It is only required on 3,500 lb axles and above. So, in your case it's perfectly safe to leave it off and this way allowing the castle nut # 165686 to fully thread on the spindle. When tightening the spindle nut it should be tightened to the point that you can feel resistance in the bearings, then backed off to the point where you can bend the tang properly which...
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  • Trailstar Trailer Axle is Bent Causing Tires to Wear Quickly
  • The problem may not be your axle at all. Is it bent upwards or downwards towards the ground? If it is upwards then that is normal but down means it does need to be replaced. The reason axles have an upward arc to them is so that when a load is placed on them they straighten out and your tires run evenly. When the inside of the tread on your tires wears on the inside that is a good indication that you are overloading the axle which is causing it to bend down too much. Try checking...
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  • Troubleshooting Uneven Trailer Tire Wear on Torsion Axle Trailer
  • The usual cause for trailer tires to wear more on the inside edges is indeed overloading. But if your 3500-lb torsion axle has not been overloaded then the most likely cause is a bent spindle (bent upwards, allowing the inside of the tire tread surface to make more contact with the road). If your bearings are not fully seated and if the hub is not secured with appropriate tension then this could allow enough play for the weight on the hub/spindle to tip the hubs/wheels/tires out of level. If...
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  • What is Causing Wear on Outer Edge of Passenger Side Tire on Trailer
  • I first recommend checking to make sure the tire is properly inflated to the maximum psi listed on the tire's sidewall. If the tire is under-inflated, the sides of the tire tread will wear quickly. If the tire is inflated properly, then it's very possible that there is an issue with the trailer's suspension components or axle/spindle. Since the wear you noticed is only on the outer edge of the tire, this might indicate that the spindle is not parallel to the ground. There could be a...
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  • Potential Causes for Uneven Wear on Trailer Tires
  • There are several potential causes for uneven trailer tire wear. If BOTH tires on the axle wear more on the inside edges this usually indicates overloading. If the tires wear on both their inside and outside edges this often indicates under-inflation. If a tire wears more in the center of the tread than on the outsides this often indicates over-inflation. But when only one tire wears only on its outside edge this would tend to indicate a bent spindle, one that is bent downward. Spindles...
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  • Methods to Remove Trapped Water Inside AL-KO Axle Beam
  • It seems that water will always find a way to get into any place that can contain it, including an axle tube that has seen lots of exposure to the elements. This is not at all unusual. I do not recommend drilling drainage holes into the axle since this has the potential to weaken the tube or at least affect its warranty. Instead I can suggest a couple of non-destructive methods to get that water out. One is to insert some cotton cloth or other wicking material to let gravity draw...
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  • How to Reduce Trailer Sway on Single Axle Car Hauler Trailer
  • By "snaking" I presume you are referring to trailer sway, with the car hauler's rear end moving side to side above the 45 mph speed you mentioned. Trailer sway like this usually has one cause: too low tongue weight (TW). Car hauler trailers, especially when they are towing different vehicles all the time, can be hard to get just right. Different cars and even slightly different placement of the same car on the trailer can result in varying TW that in some cases may be too low. When the...
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  • Troubleshooting Dexter 10-Inch Nev-R-Adjust Electric Trailer Brakes with Low Braking Force
  • Four self-adjusting brakes like the 10-inch Dexter Nev-R-Adjust # 23-468-469 should pull between 15 and 16.3-amps at 12V when the controller is set to full power. This is noted in the linked article on testing brakes which you may care to check out. You could have a ground issue that is preventing the controller's full output from reaching the magnets. If the magnets are grounded to the trailer frame I suggest checking each brake's ground ring terminal to ensure it is attached to a clean...
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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 Trailer Wheels that Toe Out Toward the Front
  • Sounds like a problem with the suspension. Check the suspension for worn out components are holes that are egg-shaped instead of round where the suspension components come together. Having your trailer checked is a good idea to verify there are no broken parts such as the axle or springs. I would recommend looking for a company that sells trailers and/or RVs and has a service department. These guys will probably have the most comprehensive hands on experience with your issue. The...
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  • Trailer Tires Showing Excessive Wear on Inside Edges of Tread
  • Typically a trailer axle will have some camber in it - some bend - such that when it is not loaded the tops of the wheels bow outward slightly, with the outside edges of the tire treads making first contact with the ground. This allows that when the trailer is loaded with weight the axle will be pushed downward to a flatter position with the tire treads level on the ground. Please refer to the linked photo showing an axle and its camber. With your trailer unloaded look at it from the...
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  • Boat Tires are Wearing on the Inside
  • When you are getting uneven wear on your tires and the part that is wearing more is on the inside then that hints towards the axle being overloaded. Axles have a natural arch in them that arches up so that when they are under a load they are horizontal and you get even wear on your tires. Overloading your axle would mean that it is arching towards the ground some and would cause that inside wear. I recommend checking the weight capacity of your axle (can be found stamped in the middle...
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  • Troubleshooting Outside Tire Wear on Single Axle Trailer
  • With a 3500 lb Dexter Trailer Axle like # 35545I-EZ-89, it is not likely that you will have an uneven tire wear on the outside if you are carrying 1200 lbs. The axles are made to for the max capacity, but carrying less weight should not unevenly wear the tires out. There is a slight bow in the through axle like this to support the full load of 3500 lbs max, but to wear your tires out, it would require more of a bow than standard. You obviously could use a smaller capacity axle for...
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  • Outside of Tires are Wearing too Quickly
  • It sounds like you are not putting enough weight on the axle. Since the arch that axles have are meant to help accommodate the weight, you most likely are not putting enough weight on it. If that doesn't work then I recommend going with a different axle as replacing tires very often can be a bit of an expense. I am linking our selection of axles for you to look through, but I do recommend going with a Timbren axle-less suspension system, like part # A35RS545. These do tend to have a...
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  • Determining the Weight Capacity of Axle on 5th Wheel Trailer
  • The first step I recommend taking is to look for any tags, stickers or embossed numbers on the axle itself. The information on the tag or sticker can help determine the axle's capacity if it is not listed. The next step is to measure the diameter of the axle because capacities are directly related to axle diameter. For instance a 2-3/8 inch axle diameter is traditionally a 3,500 lb axle but a 3 inch diameter may have a 5,200 lb, 6,000 lb, or 7,000 lb capacity. The next step is to...
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  • Troubleshooting Trailer Tire Camber on 1999 ShoreLandr Double Jet Ski Trailer with Torsion Axles
  • Because your tires are tilted in at the top and are not equal side to side, it sounds like you are overloading the axle or the torsion coils aren't working as they should. Trailer axles are intended to be slightly bent upward when unloaded so that under the proper weight capacity they level out and don't have a camber. Having that camber will most definitely wear your tires unevenly as the weight and friction will be on the inside edge of your tires. If you are interested in correcting...
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  • Troubleshooting Trailer Axle that Wears Inside of Tires Out When Unloaded
  • Before you replace your axle you should try taking your trailer to a shop that has experience in aligning trailer axles. It sounds like your axle just needs an alignment, or someone flipped the axle in an attempt to raise/lower the trailer not realizing there is a bow in the axle that doesn't allow axles to just be rotated 180 degrees. Instead you have to install new spring seats on the other side of the axle so that the bow stays facing down. Since we cannot order in custom axles at...
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  • Replacing Axle on Trailer to Add Brakes
  • Electric brakes are the way to go for lighter duty towing. They are easier to install, work great, cost less, more adjustable, and allow for easy refersing of the trailer. I attached a link to a help article that details exactly what you need to do to convert a trailer without brakes to having brakes. Since you will be replacing the axle your best option will be to go with an axle that comes with hub drums and electric assemblies already. I attached a link to a page that has all of the...
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  • Troubleshooting Outer Tire Wear on a Trailer Tire
  • You will want to check the inside of the tire and if there is wear also on the inside it will be from low tire pressure. Always make sure to inflate trailer tires to the maximum psi rating listed on the tire for maximum load carrying capacity and longer life. If the wear is just on the outside then the tire is riding at a slight angle with the bottom pointed more in toward the trailer than the top. You will need to check the suspension components, axles, spindles, to make sure nothing...
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  • What Causes Inside Wear of Trailer Tires on Boat Trailer
  • Boat trailer tires that are wearing on the inside indicates they are bowing out at the bottoms. This usually means they are overloaded or it could also mean that the axle has been flipped. A trailer axle will have a natural bow in it that is curved upward in the middle when not under load. When a load is placed on it, the axle will straighten out. If the the load is too heavy the axle will bow downward in the middle and push the bottoms of the tires out leading to excessive wear. If...
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  • Realigning Axle-less Trailer Suspension on Motorcycle Trailer
  • I recommend checking the alignment of your spindles before purchasing a new axle. Unless there is something wrong with the system itself, it may only need to be realigned. An easy way to check the alignment at home is to measure from the end of the spindle to the centerline of the trailer at the coupler. I have attached a diagram showing this measurement for you. A trailer shop, or other fabrication shop, should be able to help you re-align the trailer by removing and repositioning...
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  • Torsion Axle on Enclosed Cargo Trailer No Longer Flexes
  • Internally in the axle tube, there are rubber bumpers that will provide progressive resistance against the square torsion bar trying to twist. Over time and with disuse, the rubber bumpers become hard and brittle and will no longer provide the cushioning they used to. At this point, you'll need to replace the axle. We offer the Timbren Axle-Less suspension system like part # A35RS545 that might make an excellent solution for you. If you could get the listed capacity on the axles...
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  • Troubleshooting Uneven Tire Wear On Front Axle Of 2014 30 Foot Windjammer Trailer
  • Often when the outside edges of a tire are showing wear it is because the tires are under-inflated or there is a suspension issue. Since you have had the torsion axles replaced, it seems there is a tire pressure issue or a load issue where the load shifting or lack of weight is causing that outside wear. If there is not enough weight over that axle, the camber of the wheels will angle in versus being vertically straight. Adding weight over just that axle may help the axle to more...
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  • Uneven Tire Wear on One of Four Tires on 2000 Circle C Living Quarters Horse Trailer
  • The internal rubber cords are not always exposed to where they can be seen on torsion axles. If they are visible you will need to look at the ends of the square tube axle to see if they are exposed. Since you only have uneven wear on the one tire I recommend raising that tire and wheel of the ground. If you are able to feel play in the wheel when it is lifted then you may either have a bad axle or wheel bearings. If there is play you might be able to see if the wheel and hub are moving...
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  • Adapting a 89 Inch 3,500lbs Trailer Axle # 35545I-ST-89 for Overhung Application
  • Yes, you will need a set of the # TRSS238 Spring Seats which will fit your 2-3/8 inch round axle to adapt your # 35545I-ST-89 89 inch 3,500lbs axle to make it compatible with an overhung application. You will want to make sure you take it to a local qualified professional welder to install the spring seats at exactly your 68 inch center. I have linked the correct spring seats to this page for your convenience.
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  • Troubleshooting Trailer Hub that Fits too Tight Against the Brake Assemblies
  • Sounds like the brake assembly you are installing on your trailer has the pads adjusted too far. On the bottom of the assembly there will be a star wheel that you can turn in either direction. You will want to turn it so that the brake pads come closer together which will give your hub more clearance to install. Check out the video I attached at the 4:25 mark to see one of our installers adjusting the brake assemblies with them installed on the trailer.
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  • Troubleshooting Odd Tire Wear on Passenger Tires for 1988 Travel Trailer
  • There are a variety of possible reasons that the passenger side tires are wearing the way they are on your 1988 Travel Trailer. Starting with the simple fixes, I recommend making sure you are not overloading the axle and tires on your trailer. Check to ensure that the combined load rating for your tires meets or exceeds the loaded weight of your trailer. Do the same thing for the trailer's axle capacity. Also verify that all of your trailer tires are always inflated to their maximum...
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  • Troubleshooting Parts Needed for Eagle Scout Project Trailer Refurbishing
  • I am happy to help you get the parts you need for the Eagle Scout project to serve your city. There are many parts that go into a trailer, so why don't we start with a photo of the project if you can supply it and give me as much information as you can. Here are places to start: What is the current axle length from hub face to hub face and spring seat to spring seat (on center)? See attached photo. What does it say on the side of the current tires? All the numbers mean something,...
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