What Is the Purpose of Running Boards? | More Than Looks

If you’ve ever had to grab the steering wheel and haul yourself into a lifted pickup, you already know the struggle. A running board is a narrow step mounted along the lower side of the vehicle that bridges the gap between the ground and the cabin. While they add a rugged look, their real job is practical: they cut the step-up height down so you can get in and out without a jump or a climb.

The Primary Purpose: Easier Entry and Exit

Running boards exist to provide a stable intermediate step for high-riding vehicles. They reduce the effective distance you need to lift your foot from the ground to the door sill, which makes a real difference for everyone—especially children, seniors, and people with mobility limitations.

The function is straightforward: you step onto the board first, then into the cabin. That two-step motion beats a single high step every time.

Secondary Benefits: Protection and Style

Beyond access, running boards help shield the lower body and rocker panels from road debris. Because they sit below the doors, they take the brunt of kicked-up mud, rocks, and gravel, which keeps the vehicle’s painted surfaces in better shape.

They also serve an aesthetic role. Many owners choose them simply because they complete the look of a truck or SUV—but access assistance is the primary function, not appearance.

Running Boards vs. Side Bars and Nerf Bars

People often confuse running boards with side bars or nerf bars, but they’re not the same part:

• Running boards are wider, platform-like steps mounted flush to the rocker panel.
• Side bars are narrower, round or oval tubes mounted lower, with a visible gap between the bar and the body.
• Nerf bars are essentially a trade name for side bars, emphasizing their function as a step and body protector.

If you’re choosing between them, the wider platform of a running board gives you a more secure footing, while side bars lean more toward a rugged look with less step surface.

What to Consider Before You Buy

Running boards are vehicle-specific. Fit depends on your truck’s year, make, model, and cab configuration—a board built for a crew cab won’t bolt onto a regular cab of the same model. Ground clearance matters too, especially if your truck has a lift kit, since the mounting height has to line up with the rocker panel.

Once installed, keep the stepping surface clean and dry. Mud, snow, and ice build up quickly and turn a helpful step into a slippery hazard, so a quick rinse now and then keeps it safe to use.

Some vehicles offer power running boards that lower automatically when a door opens and tuck up tight against the body when it closes. They’re a premium option that keeps the step out of the way off-road, but the added moving parts also cost more and need occasional maintenance.

If you’re ready to add a set, our tested roundup of the best electric running boards breaks down the top models that make getting in and out effortless while keeping your truck’s clearance high.

FAQs