Unitree B2-W

What it's for

The Unitree B2-W combines wheeled driving with walking on legs. It is a variant of the B2 with retractable wheels in its feet: on level ground the robot drives at up to 15 km/h, and when it meets stairs or rubble it returns to walking on four legs.

The manufacturer and resellers point to three main uses: transport across rough ground, industrial inspection and "last-mile" logistics. In practice, that means carrying loads between buildings on a plant site (factories), patrolling long routes (security) and delivering tools to places a cart cannot reach (construction sites). The stated payload is up to 120 kg, and speed on legs is 4.2 m/s.

The model also has IP67 protection and 360 N·m of joint torque, and its software can be developed through the ROS2 SDK, which matters to integrators.

Flexibility costs mass: 80 kg is 20 kg more than the regular B2 (Unitree B2). For simple indoor inspections, of the kind we cover in the quadruped robots category, this solution is needlessly heavy.

Who it's for

Makes sense for: plants with extensive grounds, where the route is mostly flat and obstacles turn up only occasionally. Integrators building transport and inspection platforms that need a high payload and IP67 sealing. Port and terminal operators, provided the supplier can offer service.

Less suited to: companies looking for a robot for indoor spaces with narrow corridors, since 80 kg and wheels do not make maneuvering easier. Teams with no robotics experience, because the price and the complexity of the hardware call for a prepared operator. Those who expect an official price list and a manufacturer's warranty: the price comes exclusively from resellers.

It is also worth asking about certifications and explosion-hazard zones. Our sources contain no confirmation that the B2-W meets ATEX requirements, so do not assume it for Ex zones without a written declaration. We cover machine safety rules in “Robot Safety Standards”.

Deployments

The sources available to us contain no confirmed B2-W deployments, either in Poland or worldwide. The manufacturer and sellers describe uses (off-road transport, industrial inspection, last-mile logistics), but we have not found a documented plant that has written them up.

Deployments in the category are, however, well known: Spot on construction sites and in industrial plants (“Boston Dynamics Spot: Price, Uses and Availability in Poland”) and the Polish MAB Robotics Honey Badger 4.0 in Poznań's district heating tunnels.

The Unitree B2 is a brother without wheels that costs several dozen thousand zloty less. If most of your route is stairs, rubble and uneven ground, the wheels are superfluous and you are better off with the version without them.

The DEEP Robotics Lynx is another hybrid wheel-legged quadruped: 5 m/s, 15 kg payload, priced at around USD 17,999. It is considerably lighter (35 kg) and cheaper, but cannot match the B2-W's payload.

The Unitree Go2-W is a smaller wheeled version, with prices available from PLN 60,000 (≈ EUR 13,750) to 195,500. An 8 kg payload is enough for simple inspections, but not for transport.

The Boston Dynamics Spot remains the reference among inspection robots: mature software and a long track record, but no wheels and a lower payload.

The DEEP Robotics X30 is an industrial IP67 quadruped from China (56 kg), a good comparison point in price negotiations. The quadruped robots roundup gives the full picture of the category, with the models described in a single data layout.

The B2-W appeared as a wheeled-legged variant of the B2. It was publicly presented at CES 2025 in Las Vegas, where Unitree showed the Go2, Go2-W, B2-W, H1 and G1 together, one piece of evidence that the Hangzhou company is betting on a whole range of robots, from hobbyist to industrial.

The manufacturer has existed since 2016, and in 2025 it announced preparations to go public with CITIC Securities. We describe the development of Unitree's quadruped lineup in “Unitree Go2 Review: Prices and the Air, Pro, X and EDU Versions”. The idea of a wheel-leg hybrid is not new, but in the class of 80 kg and 120 kg payload it is still a rarity, which explains the lack of an official price list and the limited number of sellers.