Reitnouer suspensions are a common sight on heavy-duty utility trailers, equipment haulers, and flatbeds across North America. Known for their robust design and load capacity, these under-axle systems rely on a set of specialized components that eventually wear out and need replacement. Whether you're a fleet mechanic or a trailer owner, understanding Reitnouer suspension parts helps you make informed purchasing decisions and keep your trailer safe on the road.
What Are Reitnouer Suspension Parts?
Reitnouer suspension parts are the replacement components used in the brand's signature under-axle suspension systems. Unlike many conventional leaf spring suspensions that mount over the axle, Reitnouer designs place the spring under the axle, lowering the trailer's deck height. This configuration provides a lower center of gravity and easier loading, but it also means that parts like hangers, equalizers, and brackets have unique geometries. Common Reitnouer suspension parts include leaf springs, equalizers, hangers, bushings, and shock absorbers.
Key Components of Reitnouer Suspensions
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Leaf Springs: Reitnouer suspensions typically use multi-leaf springs. The number and length of leaves determine the load rating. For example, a 7,000 lb capacity axle often uses 25 1/4" long springs with four or five leaves. Aftermarket leaf springs from reputable brands (like Timbren or Dexter) can fit, but the bolt pattern and eye diameter must match Reitnouer's specs.
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Equalizers: Equalizers are the pivoting links that connect the front and rear leaf springs. Reitnouer uses a specific style with a central bolt hole and two outer holes. Equalizer wear is common because they absorb road shocks. Replacement equalizers should be the same thickness and hole spacing; otherwise, the suspension geometry may shift.
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Hangers: Hangers attach the leaf spring eyes to the trailer frame. Reitnouer hangers have a unique offset to accommodate the under-axle setup. Some hangers are welded, others bolt-on. When replacing, ensure the hanger's hole center distance matches the original – typically about 1" from the frame edge.
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Bushings: Bronze or urethane bushings are used in spring eyes and equalizer pivots. Worn bushings cause squeaking and misalignment. Urethane bushings last longer but may transmit more vibration. Reitnouer bushings are press-fit; you'll need a bushing press or a C-clamp to install.
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Shock Absorbers: While not all Reitnouer suspensions come with shocks from the factory, many heavy-duty models include shock mounts. The correct shock absorber length and stroke are critical. Measure from the mounting stud center to center when the suspension is at ride height (with the trailer loaded to its typical weight).
Compatibility and Application
Reitnouer suspensions appear on trailers from brands like PJ, Big Tex, and Sure-Trac, among others. Not all Reitnouer parts are interchangeable, so you must know the exact model or axle capacity.
Trailer Types
- Utility Trailers: Most common. Single or tandem axle. Parts like the 25" spring eye distance are typical.
- Equipment Trailers: Often tandem or triple axle with higher load ratings. Equalizers may be wider and hangers reinforced.
- Car Haulers: Usually have a drop axle configuration; some Reitnouer systems use a drop-center axle that requires specific U-bolts and brackets.
Weight Ratings
Reitnouer parts are rated by the trailer's GVWR. For instance:
- 3,500 lb axles: lighter duty springs (3 leaves, 1.75" wide).
- 5,200 lb axles: 4-leaf, 2.25" wide springs.
- 7,000 lb axles: 5- or 6-leaf, 2.5" wide springs.
- 10,000 lb axles: extra-leaf packs with 2.5" width and thicker leaves.
Always refer to the load rating stamped on the axle or the trailer's VIN plate. Using a spring with a lower capacity than original will cause premature sagging; too high a rating makes the ride harsh and can damage the frame.
Sourcing Replacement Parts
When buying Reitnouer suspension parts, you have two main options: OEM Reitnouer parts or aftermarket equivalents. OEM parts guarantee exact fit but can be more expensive and harder to find. Aftermarket parts from brands like Dexter, Timbren, or leaf spring specialists are widely available and often just as durable.
OEM vs Aftermarket
- OEM Reitnouer Parts: Available through trailer dealers that sell Reitnouer-equipped trailers. Reitnouer itself does not sell directly to consumers, so you must go through a dealer for genuine parts. OEM leaf springs are typically painted black with a Reitnouer sticker.
- Aftermarket Parts: Many aftermarket leaf springs and hangers are designed to match Reitnouer specs. Look for parts that specify "Reitnouer compatible" or give exact dimensions. For example, a 25.25" leaf spring with 1.75" eye width and a 2.25" hole center is common for 7,000 lb axles.
Identifying Part Numbers
- Leaf Spring: Measure the length from eye center to eye center, the number of leaves, leaf width, and bushing inner diameter. A typical 7,000 lb spring is 25 1/4" long, 2.25" wide, with 0.5" bushings.
- Equalizer: Measure from center hole to each outer hole (usually equal, e.g., 3").
- Hangers: Measure the distance between bolt holes and the drop offset.
You can often find parts using the original trailer manufacturer's part number. For instance, a PJ trailer might have a T-7-1 hanger that fits a Reitnouer suspension. Cross-reference with aftermarket catalogs.
Maintenance Tips
Regular inspection of Reitnouer suspension parts can prevent roadside failures. Focus on these areas:
- Inspection Schedule: Check every oil change or at least every 5,000 miles. Look for cracked leaves, loose U-bolts, and worn bushings.
- Lubrication: Equalizer bolts and spring eye bushings should be greased if they have grease zerks. If not, consider replacing with parts that do. Use a lithium-based grease.
- Common Wear Points: The equalizer center bolt wears out first because it sees the most pivot action. Also, the leaf spring eyes can elongate if bushings fail.
- Tightening Torque: U-bolts should be torqued to manufacturer specs (typically 90-110 ft-lb for 1/2" U-bolts). Always retorque after the first 100 miles when new.
If you notice the trailer leaning to one side, one leaf spring is likely sagging or broken. Replace both springs on the axle to maintain balance. Likewise, always replace equalizers in pairs.
Final Recommendation
For most Reitnouer suspension repairs, aftermarket parts offer a good balance of cost and quality. Stick with established brands that provide clear specifications. Always measure twice before ordering – the wrong spring length or bushing size will waste time and money. If you're unsure, take the old part to a local trailer parts shop; they can match it. For critical components like leaf springs, do not mix capacities between axles on the same trailer. A matched set ensures even loading and consistent braking.
Proper installation is just as important as the parts themselves. Use new U-bolts and lock nuts. Torque everything to spec and check after towing under load. With the right Reitnouer suspension parts and regular care, your trailer will stay safe and reliable for years.