What Are Running Boards and What Is Their Purpose?

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Running boards are flat steps mounted beneath a vehicle’s doors that make entering and exiting tall trucks, SUVs, and vans easier and safer.

For the full breakdown, see our best Aluminum Running Boards guide.

If you’ve ever climbed into a lifted pickup or a full-size SUV, you know the feeling — the seat is high, the door sill is far away, and you’re left grabbing the steering wheel for leverage. Running boards fix that by giving you a stable platform to step on before you hoist yourself up. They lower the effective step-up height, which matters most for children, older adults, and anyone with mobility limitations.

What Running Boards Actually Do For Your Vehicle

Running boards serve one primary function — access — and two secondary roles: protection and appearance. The main job is giving passengers a solid foothold when entering a taller vehicle. Beyond that, they shield the rocker panels and lower body from mud, road salt, and minor scrapes, and they change the truck’s visual profile.

They can also help in less obvious ways. Some drivers use the wide surface to wipe mud off their boots before stepping inside. Others find them useful for reaching roof racks or cargo boxes on tall vehicles. None of that replaces the core purpose, but it explains why so many truck owners keep them on year-round.

Running Boards vs Nerf Bars and Step Bars: What’s the Difference?

The terms get thrown around loosely, but there is a real distinction. Running boards are wide, flat platforms that follow the length of the cab. Nerf bars and step bars, by contrast, are typically tubular and narrower, with visible gaps between the step surface and the truck’s body.

This difference matters when you’re shopping. A wide running board gives you more surface to stand on and a more complete look along the rocker panel. A tubular step bar is lighter, often less expensive, and leaves the underbody more exposed. Neither is wrong — they’re just built for different priorities.

Do Running Boards Hurt Ground Clearance?

Yes, and it’s worth knowing before you buy. Because running boards mount below the body line, they reduce your effective clearance. On paved roads and gravel driveways, that’s rarely an issue. On serious off-road trails, it can be the difference between clearing a rock and catching it on the step.

That’s why many off-road-focused trucks ship with easily removable boards — the owners pull them off for trail season and reinstall them for daily driving. If you spend most of your time on pavement, the clearance tradeoff is minor. If you rock-crawl on weekends, you’ll want to think twice or choose a design that unbolts quickly.

How To Choose the Right Running Boards For Your Truck

Fit is everything. Running boards are built for specific trucks, SUVs, and vans — and even specific configurations of the same model. A board made for a crew cab won’t line up on a regular cab, and a wheelbase difference of a few inches can make a set unusable. Before you buy anything, confirm that the product listing matches your exact year, make, model, and cab style.

Material and finish come next. Aluminum boards resist corrosion and stay light. ABS composite boards are affordable and never rust. Steel boards are tough but heavy. Most quality sets include textured step pads or anti-slip surfaces, which matter in rain, snow, and ice — the last thing you want is a slick step when you’re already carrying groceries.

If you choose well, installation is straightforward: most boards mount with brackets that bolt to the factory body mounts.

References & Sources

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