Unitree B2 W

Overview

The Unitree B2-W is the wheeled-leg variant of Unitree's B2 heavy industrial quadruped, priced at $100,000. It replaces the standard B2's feet with driven wheels, giving it 120 kg static payload and over 40 kg walking payload while enabling efficient high-speed rolling (over 6 m/s) on flat surfaces. It retains the B2's IP67 protection and 4-hour runtime. The B2-W is positioned for warehouse logistics, large-area inspection, and industrial campus operations where both speed and terrain traversal are required.

Key Specifications

• Locomotion: wheeled-leg hybrid
• Static payload: 120 kg
• Walking payload: over 40 kg
• Top rolling speed: over 6 m/s
• Weight: approximately 65 kg
• IP rating: IP67
• Battery runtime: up to 4 hours
• Software: Unitree SDK (ROS compatible)

The 120 kg static payload is exceptional for a legged platform and enables the B2-W to serve as a mobile heavy-goods carrier in warehouse settings.

Use Cases

The B2-W is targeted at large warehouse logistics, manufacturing campus transport, and long-range industrial inspection where high-speed flat-ground travel must be combined with occasional stair or ramp negotiation. Its IP67 rating enables outdoor use in wet conditions.

Buying Used

As a high-value recent product, secondhand B2-W units are rare. When they appear, expect to pay above £65,000. Inspect wheel actuators as well as the standard leg joints, given the additional drive components. Verify IP67 seal integrity and battery cycle count.

Alternatives to Consider

• Unitree B2: The standard legged version at lower cost, if wheeled speed is not required.
• Boston Dynamics Spot: More established inspection ecosystem, though without wheeled capability.
• ANYbotics ANYmal D: IP67 with ATEX option, though without wheeled locomotion.

The wheeled leg design means that on flat ground the B2-W can cover distances much more efficiently than a pure legged robot, reducing battery consumption on warehouse floor traversal by a significant margin compared to walking. When it encounters an obstacle such as a kerb, step, or ramp, it transitions to legged walking mode automatically. This hybrid strategy is well-suited to logistics facilities that have a mix of smooth warehouse floors and loading areas with uneven surfaces.