The Ridewell Suspensions part number 2450251 is a dedicated suspension kit for the R700 series pusher axle. Designed for heavy-duty commercial trucks, this component helps distribute load, improve stability, and extend chassis life. Ridewell has been a trusted name in truck suspension systems for decades, and the 2450251 kit is engineered to meet the demands of vocational and long-haul applications. Whether you are replacing a worn unit or upgrading an existing setup, understanding this part’s specifications and proper use is essential for safe and efficient operation.
Understanding the Ridewell R700 Series and Part 2450251
What is a Pusher Axle?
A pusher axle is a non-driven axle mounted ahead of the drive axles. It increases the vehicle’s gross vehicle weight rating (GVWR) by supporting additional payload. Unlike a tag axle (mounted behind the drive axles), a pusher axle transfers weight to the front of the chassis, improving traction and braking balance. The R700 series from Ridewell is a trailing-arm, air-ride suspension specifically designed for pusher applications, offering adjustable height, excellent articulation, and a smooth ride.
Key Features of the 2450251 Kit
Part 2450251 is the complete suspension assembly for a single pusher axle on the R700 series. It includes the trailing arms, air springs, shock absorbers, pivot bushings, and all necessary mounting hardware. Notable features:
- Trailing arm design: Allows controlled axle movement while maintaining alignment.
- Air-ride dampening: Provides a cushioned ride, reducing driver fatigue and protecting cargo.
- Adjustable ride height: Can be tuned to match chassis height and load conditions.
- Durable construction: Heavy-duty steel components with corrosion-resistant coatings.
The kit is rated for axle capacities typically from 13,000 to 20,000 pounds, depending on the specific configuration and air spring selection. Always verify the exact load rating stamped on the part or in the installation manual.
Compatibility and Applications
Vehicle Fitment
Ridewell’s R700 system is designed for Class 6–8 trucks with frame widths of 34 to 40 inches. The 2450251 kit is commonly used on Freightliner, International, Kenworth, Peterbilt, and Volvo chassis, but it may require additional brackets or spacers for certain models. Before purchasing, confirm the frame rail width, axle spacing, and existing suspension mounting points. Ridewell provides detailed fitment charts through their distributors.
Weight Ratings and Capacity
The 2450251 is not a single rating but a platform; the actual capacity depends on the air spring option (e.g., single or dual bellows) and the shock valving. Typical applications support up to 15,000–20,000 lbs per axle. Overloading beyond the suspension’s rating can lead to component failure and void warranties. Always consult the vehicle’s GVWR and never exceed the lower of the axle, tire, or suspension ratings.
Installation Considerations
Required Tools and Prep
Installing a pusher axle suspension kit is a major job. You will need:
- Heavy-duty jack stands and a transmission jack or axle lift.
- Torque wrenches (check specs: typically 250–600 ft-lbs on main pivots).
- Cutting tools if frame modifications are needed.
- Air system components (leveling valves, air lines, fittings).
- Safety gear: chock wheels, wear steel-toe boots.
Clean the frame area thoroughly. Remove any old suspension components. Do not reuse worn hardware.
Professional Installation Advice
While experienced mechanics can install the 2450251 kit, this is not a beginner project. Misalignment of the axle can cause tire wear, poor handling, and stress on the frame. Key steps:
- Position the axle per Ridewell’s specifications (usually 25–30 inches ahead of the drive axle centerline).
- Pre-assemble the trailing arms and air springs on the bench, then lift the assembly into place.
- Torque pivot bolts in stages, following the sequence in the manual.
- Adjust the ride height using the control arms and leveling valve.
- Test for clearance with the frame, tires, and suspension components during full articulation.
If in doubt, hire a certified truck suspension specialist. A poorly installed pusher axle can compromise safety.
Performance and Maintenance
Ride Quality and Stability
The air-ride R700 series delivers a noticeably smoother ride compared to mechanical suspensions. The trailing arm design keeps the axle tracking straight, reducing tire scuffing. Load equalization between the pusher and drive axles is managed by the air system, improving traction on slippery surfaces. The 2450251’s shock absorbers are tuned to control oscillation; some operators prefer upgrading to heavy-duty shocks for severe-service applications.
Routine Inspection and Care
Regular maintenance extends the life of the suspension:
- Check air pressures: Leaks in fittings or air springs cause sagging and poor weight distribution.
- Inspect bushings and pivot joints: Worn rubber can cause misalignment. Replace every 150,000–200,000 miles or as needed.
- Torque bolts: Vibration can loosen fasteners. Retorque after the first 500 miles and then annually.
- Lubricate moving parts: Some pivot joints have grease fittings; apply chassis grease per the manual.
- Look for corrosion: In salt-belt regions, wash the suspension regularly and apply anti-corrosion coatings.
Neglecting these checks can lead to premature failure of air springs or broken trailing arms.
Sourcing the Part – What to Look For
When purchasing the 2450251 kit, buy from a reputable Ridewell distributor. Avoid counterfeit or reconditioned parts without documentation. Ensure the kit includes all hardware; sometimes bolts and nuts must be ordered separately. Verify the serial number with Ridewell’s catalog to confirm it matches your axle rating. Also, ask about the warranty – typically two years, but some distributors offer extended coverage.
Final Recommendation
For fleets or owner-operators needing a reliable pusher axle suspension, the Ridewell 2450251 R700 kit is a solid choice. It offers proven design, good ride quality, and robust construction. Before buying, double-check compatibility with your truck’s frame and existing air system. Professional installation is strongly advised unless you have extensive experience with heavy-duty suspensions. Stick to OEM or authorized parts for maximum safety and longevity. By following proper installation and maintenance schedules, the system will provide years of dependable service.