What Is a SuperSteer Trim Unit and Is It Worth Adding to Your Safe-T-Plus?

If your motorhome is equipped with a Safe-T-Plus steering control, you've probably experienced the added stability and steering confidence it provides. But what happens when you're driving through a strong crosswind or spending hours on a road with a heavy crown?

That's where the SuperSteer Trim Unit comes in.

The SuperSteer Trim Unit allows you to adjust the center position of your Safe-T-Plus steering control while you're driving. Instead of fighting constant steering pressure caused by changing road conditions, you can make quick adjustments from the driver's seat, helping reduce fatigue and improve comfort over long distances.

The Trim Unit is an air-operated system designed to work alongside your Safe-T-Plus steering control.

With the push of a momentary switch mounted inside the cab, the system temporarily releases the clamping force on the steering control's anchor assembly. As you steer into a crosswind or compensate for road crown, the Safe-T-Plus establishes a new center position. Once you release the switch, the system locks that new center point in place.

The result is a steering stabilizer that's adjusted for your current driving conditions without having to stop and manually reposition it.

Road conditions are constantly changing.

You may encounter:

Normally, these conditions require you to hold steady pressure on the steering wheel to keep your coach tracking straight.

With a Trim Unit, the Safe-T-Plus can be adjusted to hold that steering position for you, reducing the amount of constant correction needed from the driver.

The SuperSteer Trim Unit uses compressed air to operate, making it an excellent fit for air ride motorhomes. Because these coaches already have an onboard air system, the Trim Unit integrates naturally into the existing air supply. This makes it particularly well suited for larger diesel-powered Super C motorhomes built on Freightliner chassis.

The Trim Unit works in conjunction with the Safe-T-Plus steering control. The steering control still attaches to the tie rod in the same manner as a standard installation. The primary difference is on the anchor side of the steering control.

Instead of using a conventional fixed mounting bracket, the Trim Unit utilizes:

When the driver presses the switch, the solenoid releases air pressure from the chamber, allowing the sliding bolt assembly to move and establish a new center position. Once the switch is released, the air chamber repressurizes and securely clamps the assembly into its new position.

Although the steering control installation itself is straightforward, routing the air lines and installing the control switch inside the cab requires careful planning. Every coach is different, so switch placement is typically customized to provide the most convenient location for the driver.

No.

The Trim Unit is designed to work with a Safe-T-Plus steering control, not replace it. The Safe-T-Plus continues to provide its steering stabilization and return-to-center characteristics. The Trim Unit simply allows you to adjust where that center position is while driving.

The SuperSteer Trim Unit is designed for several chassis.

Current applications include:

Development is also underway for the:

As additional applications become available, SuperSteer continues expanding fitment options for more Freightliner-based motorhomes.

The Freightliner Cascadia is already an exceptionally stable chassis. Unlike many motorhomes, it typically isn't pushed around excessively by wind or passing trucks.

However, even highly stable coaches can benefit from being able to compensate for:

Rather than making major handling corrections, the Trim Unit provides another level of refinement that allows drivers to fine-tune their steering feel while traveling.

A Safe-T-Plus steering control already provides significant improvements in steering stability and driver confidence. Adding a SuperSteer Trim Unit builds on those benefits by allowing the steering control to be adjusted on the fly for changing driving conditions.

Whether you're traveling in steady crosswinds, driving on heavily crowned roads, or simply looking to reduce steering effort during long travel days, the Trim Unit offers an added level of convenience and control that many Freightliner Super C owners appreciate.

If you have questions about the SuperSteer Trim Unit, Safe-T-Plus steering controls, or other steering and suspension upgrades, the team at SuperSteer is here to help. Give us a call at 888-898-3281, visit supersteerparts.com, or email sales@supersteerparts.com to speak with one of our suspension specialists.

If you're interested in having a Safe-T-Plus or SuperSteer Trim Unit professionally installed, schedule an appointment with Henderson's Line-Up in Grants Pass, Oregon. Our experienced technicians specialize in RV steering, suspension, and alignment solutions designed to improve driver comfort and confidence. Call 541-479-2882 or visit hendersonslineup.com to schedule your next appointment.

Thank you for reading this blog and until next time we wish you safer and happier driving.