Unitree B2-W

A wheeled-leg version of Unitree's B2, with driven wheels for both walking and fast rolling.

B2-W is a wheeled-leg robot Unitree Robotics built on the B2 platform, reportedly released in 2024: the feet at the end of all four legs are replaced with driven wheels, letting it roll like a vehicle on flat ground while still lifting a leg to step over curbs or rubble, combining a wheel's efficiency with a leg's ability to cross obstacles. Published specs: about 85 kg including the battery; a standing payload of up to 120 kg and a walking payload over 40 kg; a top speed of 15 km/h; about 30 km of unloaded range, dropping to about 25 km carrying a 40 kg load; and an IP67 rating. It suits scenarios with long distances and mixed terrain, such as campus patrol, long-distance outdoor transport, and emergency response, and its coordinated wheel-and-leg motion is often used to showcase reinforcement-learning locomotion-control capability.

ExampleIn the field, a B2-W carries supplies along a dirt road at high speed on its wheels, then lifts its legs to cross a ditch before rolling on.

Related

Wheel-legged Robot · Unitree B2 · Unitree Go2-W · Unitree Robotics · Inspection Robot · RL-based Locomotion Control

Sources

Unitree B2-W 官网 (Chinese)

As of

2026-09