Super C motorhomes, built on the Freightliner S2RV and M2 chassis, offer a robust platform for comfortable long-haul travel. However, many owners experience steering play, handling challenges, and ride discomfort. In this educational blog, we explore the best steering and suspension upgrades to improve safety, stability, and overall driving experience.

Common Steering Issues and Solutions

Super C owners often face challenges like excessive steering play, poor returnability, and vehicle wander. Fortunately, there are effective upgrades to address these problems:

1. Safety Plus Steering Stabilizer

The Safety Plus Steering Control is a self-centering stabilizer with 230 lbs of centering force, which helps:

• Maintain straight-ahead steering.
• Resist crosswinds and wander.
• Improve return-to-center behavior after turns.
• Enhance control during front tire blowouts.

For S2RV and M2 chassis, the recommended part number is 41-230, combined with a specific bracket kit. M2 owners should measure their tie rod diameter and U-bolt size to ensure proper fitment.

2. New Adjustable Trim Unit for S2RV

A game-changer for Super C motorhomes, this new air-adjustable trim unit allows drivers to fine-tune the steering stabilizer’s center point while driving. This innovation is particularly beneficial for handling crosswinds and road crown variations, improving overall driving ease.

TracBars for Steering Stability

A front trac bar minimizes lateral movement of the front axle, reducing steering vagueness and improving response. Available for both S2RV and M2 chassis, track bars enhance straight-line stability and control, especially in crosswind conditions.

Improving Ride Quality

Ride discomfort is often due to improper weight distribution, harsh suspension, and incorrect tire pressures. Solutions include:

1. Proper Tire Inflation and Weight Balancing

Using tire manufacturer pressure charts ensures that your tires are inflated to the correct PSI based on actual axle weight. Maintaining an ideal 1:2 front-to-rear weight ratio improves handling and ride comfort.

2. Koni Shocks for Better Damping

Henderson’s Line-Up has partnered with Koni for over 20 years, offering superior ride control with adjustable shock absorbers. While Super C motorhomes do not have factory-tuned Koni shocks, trial-and-error testing has identified the best available options:

• S2RV Front: Koni 99B-3209
• S2RV Rear: Koni 8805-1009
• M2 Front: Depends on ride height, with options including 3209 and 1031
• M2 Rear: Koni 8805-1009

These shocks significantly improve both ride comfort and handling by reducing excessive movement and sway.

Handling and Sway Control

A stable ride is crucial for safety and driver confidence. Key handling upgrades include:

1. Motion Control Units (MCUs)

These limit excessive air transfer between suspension airbags, reducing side-to-side sway. The threaded-style MCUs are currently available for immediate purchase.

2. SumoSprings for Added Support

SumoSprings provide additional stability by enhancing suspension support. While they are effective in controlling sway, shocks and sway bars typically yield more noticeable improvements.

3. Upgraded Anti-Sway Bars

A major contributor to improved handling, sway bars limit body roll and increase stability:

• S2RV Rear: Upgraded from 1.75" to 2.0" diameter for a 60% increase in strength.
• S2RV Front: Adds a front sway bar, significantly improving cornering stability.
• M2 Rear: Roadmaster’s 1.75" sway bar is available for most M2 models, except those with rear auto chains.
• M2 Front: The factory sway bar (1.5") is often weakened by failing stem and hat bushings, which can be upgraded to a superior bolt-and-eyelet system.

Conclusion: Invest in a Safer, Happier Drive

By upgrading your Super C motorhome’s steering, suspension, and handling components, you can dramatically enhance your driving experience. Henderson’s Line-Up and SuperSteer offer expert guidance and high-quality products to help you achieve safer and happier driving.

Not long ago Tommy did a webinar and it goes into more detail on what is discussed on this blog. Please feel free to watch the recording below or if you have questions you can call 888-898-3281 to speak with an expert today.