Launched in 2022 with a $400 million investment from Hyundai Motor Group, the RAI is led by Marc Raibert, founder and current chairman of Boston Dynamics. Known for creating advanced robots like the acrobatic Atlas and the dog-like Spot—which even grabbed attention with a performance on America’s Got Talent—Boston Dynamics has set a high bar in robotics. Given Raibert’s track record and the remarkable agility of BD’s machines, it comes as no surprise that RAI has now unveiled a new video showcasing Roadrunner.

Figure 1. Robot Legs Impress in Demo with Skating, Stair Climbing, and One-Wheel Balance.

As shown, the 15-kg (33-lb) Roadrunner is essentially a pair of robotic legs mounted on two wheels—but those legs are anything but ordinary. It can glide smoothly with the wheels side by side or shift into an inline setup, with one wheel trailing the other. It handles stairs impressively too, either rolling up and down them or locking its legs to stomp its way across—sometimes with all the subtlety of a noisy neighbor at 2 a.m. Figure 1 shows Robot Legs Impress in Demo with Skating, Stair Climbing, and One-Wheel Balance.

Beyond that, Roadrunner can even balance on a single wheel and change direction by simply bending its “knees” the opposite way. According to RAI, its fully symmetrical leg design allows the knees to face forward or backward, helping the robot navigate obstacles and perform precise movements.

A Minimal Yet Powerful Design

The robot, known as Roadrunner, keeps things simple—just two legs and two wheels—but packs advanced engineering into that compact form. Its lightweight build (around 15 kg) allows it to move quickly and efficiently without bulky hardware.

Skating-Like Mobility

One of its standout features is how it moves on flat surfaces. With wheels placed side-by-side, it glides smoothly like a skater. It can also switch to an inline configuration, placing one wheel behind the other for better balance and maneuverability in tighter spaces.

Mastering Stairs

Unlike most wheeled robots, Roadrunner can handle stairs with ease. It can either roll up and down steps or lock its legs and “walk” over them. This flexibility makes it useful in real-world environments where terrain isn’t always smooth.

One-Wheel Balancing Act

The robot can balance on a single wheel—something that requires precise control and constant adjustment. This ability showcases its advanced stability system and real-time response to changes in balance.

Smart Direction Switching

Roadrunner’s symmetrical legs allow its “knees” to bend forward or backward. This means it can quickly change direction without turning its whole body, helping it avoid obstacles and move more efficiently in dynamic environments.

Source: NEW ATLAS

Cite this article:

Priyadharshini S (2026), Robot Legs Wow in Demo: Skating, Stair-Climbing, and One-Wheel Balancing, AnaTechMaz, pp. 364