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Expert Answers about Trailer Leaf Spring Suspension


  • Tandem Axle Trailer Suspension Upgrade Kits That Use Leaf Springs and Replace Leaf Springs
  • We have multiple options in a trailer suspension kit, including one that retains your existing double-eye leaf springs, the Lippert Center Point # LC1565391, as well as the Timbren Silent Ride kits like # TSR14KT01 that DO get rid of your leaf springs. All tandem trailer kits are shown on the linked page. The Lippert Center Point # LC1565391 replaces the equalizer in your tandem axle leaf spring suspension with an air bag. Center Point adds air ride suspension to any RV or horse trailer,...
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  • Trailer Suspension Lift Kit for 2004 Starcraft Centennial 3600 with Single Torsion Axle
  • A pop-up camper trailer like your 2004 Starcraft Centennial 3600 will have either a leaf spring suspension, a torsion axle suspension or if it was modified by a previous owner it could have a Timbren axle-less suspension kit like # A35RS545. Torsion axles do connect directly to a trailer frame and their rubber cord "springs" are internal, inside the axle tube. Chances are this is what you have if you don't see any leaf springs. We do have lift kits # K71-384-00 and # K71-385-00 for standard...
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  • Suspension Enhancement For 2000 Ford F53 Motorhome
  • The suspension enhancement we offer for your 2000 Ford F53 are designed to be installed between the axle and the vehicle frame. For your F53 I recommend the Firestone Vehicle Suspension, part # F2170. Installing any enhancement system will not increase the load-carrying capacity of the vehicle and should only be installed on a vehicle with a properly working suspension. The leaf springs we offer here are designed to work with trailer suspension. You may want to check with your motorhome...
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  • Crossmember Support Options for a 5th Wheel Trailer
  • The correct crossmember support depends on the suspension you have on your 2015 27.5 ft. Jayco 5th wheel. Unfortunately that is not information we have, so you will need to take a look at your suspension to pick the correct option. I have listed the options we have below, listed by what suspensions they fit. Stock Leaf Spring Suspension # MR84AR LRE, RE, or TRE Leaf Spring Suspension # MR99ZR CRE, SRE, or Stock Leaf Spring Suspension # MR33WR All of these crossmember options adjusts...
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  • Do You Sell Replacement Bushings for the Leaf Springs on my Boat Trailer
  • Yes, we do sell bushings for use with trailer suspension systems. I am including a link that will show you all of the sizes of bushing that we have available.
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  • Availability of Product to Provide Suspension Lift for Keystone Fifth Wheel Trailer
  • We do indeed have some kits that will raise the axles a bit, but we would need to know the manufacturer of the axle (look for a tag or sticker affixed to the axle tube) and whether the trailer has a torsion or a leaf spring suspension. Since you're using the road armor system, you'll have a leaf spring suspension. The best bet would be the Tandem axle lift kit, # RR23QX. The kit would lift your trailer by 2-1/4 inches. If your leaf springs sit under the axle, and your axle is 2-3/8 or...
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  • Available Trailer Suspension Spring Hangers, Wet Bolts and Bushings
  • We do offer all trailer suspension components including leaf spring hangers, suspension bolts, bushings, etc. All of these are shown on the linked page. I also linked the specific pages for hangers like # 28-5, wet bolts like # TRFA71063 and bushings like # TRFA71063. These item are not weight-rated so you can simply select them by their dimensions. Also included is an article that covers the process of converting a trailer to hydraulic disc brake operation. A link to all disc brake...
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  • Rear Axle Suspension Enhancement Kits for 2012 Mercedes-Benz Sprinter 3500 Cab and Chassis Flatbed
  • We do offer several rear-axle kits and a front axle suspension kit for your 2012 Mercedes-Benz Sprinter 3500 Cab and Chassis Flatbed but none of these is an air spring. All available suspension enhancement products for your vehicle are jounce or leaf spring types. The Timbren front-axle jounce spring kit we offer for your 3500 is # TMBFSP35, which is a no-drill bolt-on kit. For the rear axle you have several options including overload pads # TLA7311 from TorkLift that can be easily removed...
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  • Recommended Suspension Enhancement for 1995 Ford F-250 With In-Bed Hitch
  • Both Air Lift and Firestone air bags are not compatible with an in-bed hitch on the 1995 Ford F-250. Unfortunately there is no kit or workaround for this. If you're looking for suspension enhancement to keep you level and improve your ride while towing or hauling heavy loads, I recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-HD. This kit kit converts your vehicle's factory leaf springs into a mechanically active suspension system. This will help keep you...
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  • Available Trailer Axle Kits for Lightweight Offroad Tear Trailer Build
  • We offer both standard beam axles and axle-less trailer suspension kits from Timbren, some of which come complete with electric drum brakes and hubs in a 3500-lb rating. But in your lower-capacity requirement we do not have complete axle kits with brakes since often such lighter trailers do not require brakes. This can vary by state but you might want to check whether you even need to install brakes for a trailer of the weight you are planning to build. For a complete 1800-lb beam axle...
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  • Availability of Wet Bolts for Trailer Double-Eye Leaf Spring Suspension
  • You are looking for what we call wet shackle bolts that include a grease zerk fitting for easy lubrication. We offer two such items. Redline part # 126B2 is a 9/16-inch diameter wet bolt that is 3-5/16-inches long overall with a usable length of 2-5/16-inches. Part # 34007-187-00 is a stepped type wet bolt of 7/16-inch diameter that is 3-7/16-inches long overall with a usable length of 3-inches. I linked our main page for spring bushings; you can choose your dimensions using the filters...
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  • SumoSprings Trailer Helper Springs Recommendation for OverSlung Trailer Axle
  • Drop axles don't drop the distance between the trailer frame and axle as basically the drop is after the suspension and between the spindle. So the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-106-40 would install just fine on a drop axle. But sounds like you have an overslung axle based on the distance between your leaf spring and trailer frame. So for that you'd instead want the part # TSS-107-40.
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  • Available Wet Suspension Bolts for Use with Equa-Flex Trailer Suspension Equalizers
  • We do offer wet bolts for trailer suspensions with 1-3/4-inch-wide leaf springs. Part # 126B2 is a 9/16-inch diameter wet bolt that measures 3-5/16-inches overall with a 2-5/16-inch usable length. This and all other wet bolts are displayed on the linked page. We also have a 7/16-inch diameter bolt, part # 34007-187-00, which is a stepped bolt that measures 3-7/16-inches long. Since there are several versions of the Equa-Flex cushioned equalizers you'll want to measure the diameter and...
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  • Custom Leaf Spring Enhancement Kit for 1975 Ford F-250
  • Yes, the RoadActive Suspension Custom Leaf Spring Enhancement Kit, # RAS3611-HD will fit your 1975 Ford F-250. This custom-fit kit comes fully assembled and is easy to install. Each RAS unit simply bolts onto your factory leaf spring with the included hardware, and drilling, welding, and cutting aren't required. First, position the eye hook bracket so that it wraps around the top of the factory leaf spring eye. Then the axle bracket secures under the leaf spring and around the factory U-bolts...
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  • Solution for Gaining Ground Clearance on Trailer by Lifting Suspension
  • You always want to tow your trailer as level as possible so the best option to gain ground clearance would be to raise the suspension of the trailer. You can do this by moving the axles from being above the leaf springs to below the leaf springs. The diameter of your trailer axle will determine the size of the parts that you will need to order. If your axle is 3 inches diameter, the Dexter Trailer Springs Over-Under Conversion Kit, # K71-385-00, would be a great choice and if your axle...
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  • Available Types of Suspension Enhancement Kits for 2016 Ford F-250 Super Duty
  • Although RoadActive does not offer an active suspension kit like # RAS2611-V for your 2016 Ford F-250 Super Duty we do have many options in both front- and rear-axle suspension enhancement kits that include jounce spring, air bag and leaf spring products. The best one for you will depend on your specific needs and budget. Jounce springs like the Timbren kit # TFR250SDG are relatively cost-effective, simple to install (no drilling), maintenance-free and they provide independent progressive...
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  • Best Suspension Enhancement for 2019 Chevy Express 2500 to Reduce Wheel Hop
  • What you are experiencing is called wheel hop and we have exactly what you need to minimize that in your 2019 Chevy Express 2500. I highly recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit; you will need either # RAS2613-M (for Passenger Vans) or # RAS2611-V (for Cargo Vans). This is the best suspension enhancement for your van because it is an active system which will absorb the force of the up-and-down movement that causes your van to bounce. That force is normally...
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  • Availability of Lift Kit for Pop-Up Trailer
  • If your pop-up has a leaf spring suspension and a 2-3/8 inch diameter axle beam, an over/under conversion kit might be the solution. If your leaf springs are currently mounted to the underside of the axle beam, an over/under kit will allow you to relocate the springs to the top of the axle beam, which would gain you a height increase equivalent to the diameter of the axle tube plus the thickness of the spring pack. If the leaf springs are currently mounted under the axle, and the axle...
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  • Trailer Suspension Enhancement For Big Tex 14PH Trailer With 7,000LB Axles and 2" Slipper Springs
  • For your Big Tex 14PH trailer I recommend the Timbren Trailer Suspension Enhancement System Medium-Duty Trailers 7,000 lbs # TTRA1032. You will need one kit for each of your axles. These will fit between the axle tub and frame to provide you with better support and a smoother ride. The SumoSprings are only designed to fit 1-3/4" wide spring applications. I have linked the installation instructions below that show how these fit and how the mounting plates will need to be positioned and then...
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  • Recommended Suspension Enhancement for 2004 GMC 2500HD with Quadrasteer
  • I may have a solution for you to help upgrade the suspension on your 2004 GMC Sierra 2500 HD, but there are not any air bag kits that are compatible with the trucks that have Quadrasteer. However, you could use the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD, which will convert your leaf spring suspension to a mechanically active suspension system and help reduce sway and body roll when you're carrying your cab over camper. Similar to airbags, these...
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