What Is a Truck Step Called? | Names, Types & Buying Fit

If you have searched for a way to make getting into your pickup easier, you have likely encountered several terms for the same part. The name you use matters less than knowing the difference between the styles, because shape determines function. Whether you are replacing a worn step or adding one for a lifted truck, understanding the terminology ensures you order the right part for your cab length and step width.

What Are The Common Names For A Truck Step?

Retailers use three main names for the accessory that mounts below your doors: running boards, nerf bars, and side steps. These terms describe related but distinct products.

Running boards are wide, flat boards that run along the rocker panel. They provide a full step surface and can span the entire cab length or extend to the bed. Traditional running boards can be as wide as ten inches, while some powered options deploy to a six-inch wide non-slip board.

Nerf bars, also called step bars, are tubular side steps. They are typically a single aluminum or steel tube with slip-resistant rubber foot grips positioned under each door. Nerf bars are commonly made from stainless or carbon steel, with some aluminum models available.

The term side steps is the umbrella category. It covers running boards, nerf bars, drop steps, and related accessories, which is why you will see it used broadly across product listings.

Running Boards vs. Nerf Bars: What Is The Difference?

The structural difference comes down to flat boards versus round tubes. Running boards offer a wide, continuous stepping surface, while nerf bars trade width for a rugged, tubular look with grip pads only where you step.

Running boards are usually four inches or wider and may offer rocker protection against mild impacts and abrasions. They are a solid choice for families and anyone who wants a generous step area. Nerf bars are often preferred on lifted trucks because they reduce the stepping distance from cab to ground while keeping a lower profile.

Product naming is inconsistent across retailers and the terms are sometimes used interchangeably, so always check the product images and dimensions rather than relying on the title alone.

How Do You Choose Between The Step Styles?

Your choice depends on cab length coverage, step width, and whether you want a fixed or deployable step. Start by measuring the distance between your cab doors and confirming your truck model, since fitment is specific to vehicle model and mounting points rather than universal.

If you want maximum stepping room and drive a standard-height truck, running boards deliver the most comfortable entry. If you drive a lifted truck and want to reduce the step-up height while keeping a lower visual profile, nerf bars are the practical pick.

Powered or electric steps are worth considering when ground clearance matters. These deploy only when a door opens, keeping the step out of the way during off-road driving.

One important distinction: running boards and nerf bars are not rock sliders. Rock sliders are reinforced protection bars built for off-road impacts, while steps prioritize entry convenience. If hardcore trail protection is the goal, buy sliders separately.

When you are ready to compare tested options, our roundup of the best truck step tubes breaks down top picks by build and fit.

Frequently Asked Questions

Are truck steps and side steps the same thing?

Side steps is the broad category name, while truck steps is the general everyday term. Both can refer to running boards, nerf bars, or step bars. If you can answer one question, it matters most: what is it called when you order it? The key is to verify the product shape and dimensions rather than assuming the title matches your expectation.

Why are nerf bars better on lifted trucks?

Lifted trucks sit higher off the ground, and nerf bars mount lower along the rocker panel to shorten the distance you need to climb. Their tubular shape also holds up well to the occasional brush with branches or obstacles, though they are not designed for heavy rock impact protection.

Will running boards fit on any pickup truck?

No. Running boards are vehicle-specific. Fitment depends on the truck model, cab configuration (regular, extended, or crew), and mounting points along the frame. A board built for a crew cab will not fit a regular cab. Always check the manufacturer fitment guide before purchasing.