FX Aegis Ultra-W Wheel-Legged Robot Dog

Ask anyone who runs patrols what they need from a robot and the answer is rarely "more agility." It is coverage: more ground per shift, fewer interruptions, and a machine that doesn't announce itself with every step. The FX Aegis Ultra-W was built around that answer. It drives most of its route on wheels, and walks only when the route demands it.

Faraday Future introduced the Ultra-W in 2026 as part of a nine-configuration expansion of its robot line. The company describes it as a lightweight professional wheel-legged robot for security and companionship. Its roughly 22 kg body combines:

• wheeled mobility
• legged obstacle clearing
• low-noise operation
• an open development platform

Launch coverage reports speeds above 19.8 km/h and climbing on slopes up to 40 degrees.

It is the wheel-legged counterpart to the legged Aegis Ultra. For buyers who need even more, the Ultra-W+ sits one tier above it.

Background

From robot dog to patrol vehicle

Faraday Future, the California electric-vehicle maker, launched the FX Aegis in early 2026 as a professional quadruped for security and companionship. The series then passed the compliance certification needed for formal sale in the United States. At the Automate show in mid-2026, Faraday Future positioned the Aegis as a practical tool for small businesses and property managers. The range scales from base models up to fully configured versions on wheels, and the Ultra-W is that wheeled step.

The idea is simple: give a capable quadruped the efficiency of a vehicle. Putting a wheel at the end of each leg lets the Ultra-W travel like a small, fast rover on paved paths. It keeps the articulation to climb a curb or cross an obstacle a wheeled robot would stop at.

Part of a shared AI ecosystem

Every Faraday Future robot runs on the same embodied-AI architecture, which the company describes as "one brain, multiple forms." Skills developed for one robot can be adapted to another through Faraday Future's skills ecosystem. The Ultra-W ships with a Skills Package, so it can start from that library rather than from scratch.

Why Wheel-Legged?

For most real patrol routes, which are mostly paved with occasional obstacles, wheel-legged design delivers more coverage per charge with less noise. For sites dominated by rough terrain or stairs, compare the legged Aegis Ultra.

Design and Features

Lightweight professional build

At about 22 kg, the Ultra-W is light enough for one or two people to handle, transport and deploy. That matters for operators who move robots between sites, or who need to lift one over an obstacle it shouldn't attempt.

Speed with discretion

The Ultra-W pairs one of the highest speeds reported for an Aegis model with low-noise operation. It suits:

• night shifts
• hotels
• residential communities
• offices
• any environment where a patrol robot should be seen when useful and unheard otherwise

Built to be developed on

Faraday Future designed the Ultra-W as an open platform with support for:

• secondary development for custom behaviors and applications
• simulation training to develop and test skills before running them on hardware
• multi-robot coordination for fleets sharing routes and tasks
• professional payload expansion for mission-specific equipment

In the Ultra tier of the Aegis family, Faraday Future offers SDK and API access, NVIDIA Isaac Sim support, visual programming with Python and the OpenClaw no-code tool. Confirm the exact development stack for your Ultra-W configuration.

Patrol, follow and integrate

Aegis-family capabilities include autonomous patrol and follow-me modes. The robots can also integrate with home, campus and industrial security systems for continuous patrol, status reporting and coordinated responses. Wi-Fi and 5G connectivity, with expandable remote operation, support work across large sites and areas with weak network coverage. More autonomy features are being delivered through over-the-air updates.

Ready for add-ons

Across the Aegis platform, Faraday Future lists expansion options such as:

• LiDAR
• depth cameras
• communication modules
• robotic arms
• fire extinguishers
• dedicated security modules

That makes one Ultra-W adaptable to different missions over its working life.

Specifications

Confirm compute, sensors, battery, runtime and ingress rating for the Ultra-W against Faraday Future's current datasheet.

Choosing Within the Aegis Ultra Range

• Aegis Ultra: the legged industrial-grade quadruped. Best for rough terrain, stairs and inspection rounds.
• Aegis Ultra-W: the lightweight wheel-legged model. Best for fast, quiet coverage of mostly paved routes with obstacles along the way.
• Aegis Ultra-W+: the higher-tier wheel-legged configuration, for buyers who want the top of the wheel-legged line.
• Aegis Hyper: the large industrial wheel-legged platform for extreme environments and heavy professional payloads.

Applications

• Property and community patrol. Regular rounds of parking areas, paths and perimeters, covered quickly and quietly.
• Small-business security. An after-hours presence for retail sites, warehouses and offices.
• Campus and facility monitoring. Continuous patrols linked to existing security systems.
• Hospitality. Discreet patrol and guest-facing companionship in hotels and resorts.
• Fleet operations. Multiple Ultra-W units coordinating coverage across large sites.
• Research and education. Hybrid-locomotion experiments, simulation-to-real training and custom skill development.
• Personal companionship. A fast, capable partner for outdoor trips and carrying gear.

What to Plan For

• Map the route first. Measure the share of flat ground versus curbs, steps and rough terrain to confirm wheel-legged is the right fit.
• Plan charging around patrols. Confirm runtime for your configuration, and schedule battery swaps or docking so coverage has no gaps.
• Check weatherproofing. Confirm the ingress rating before outdoor or wet-weather deployment.
• Handle data responsibly. Patrol robots record video and audio. Provide clear notice and define retention and access in line with local privacy law.
• Confirm radio approvals. 5G and other radio modules may need local certification outside the United States.
• Start small. Pilot one route, measure coverage and response, then scale to a coordinated fleet.

Pricing and Availability

The FX Aegis Ultra-W is available for purchase directly on this page, with its Skills Package included. Pricing reflects the configuration, payload modules, spare batteries and quantity. For property managers, security providers, institutions and multi-unit fleets, request a quotation on this page to confirm configuration, lead time, onboarding and support.

Frequently Asked Questions

What is the FX Aegis Ultra-W?

It is Faraday Future's lightweight professional wheel-legged robot dog for security and companionship. It weighs about 22 kg and combines wheeled travel with legged obstacle clearing.

Why choose a wheel-legged robot dog?

Wheels cover flat ground faster, more quietly and more efficiently than walking, while the legs still let the robot climb curbs and clear obstacles. Most real patrol routes suit that combination.

How fast is the FX Aegis Ultra-W?

Launch coverage reports speeds above 19.8 km/h, with slope capability up to 40 degrees.

Is the Ultra-W quiet enough for indoor or night use?

Faraday Future highlights low-noise operation as a key feature of the Ultra-W, which makes it well suited to night patrols, hotels, residences and offices.

Can I develop my own applications for the Ultra-W?

Yes. It supports secondary development, simulation training and multi-robot coordination, and it ships with a Skills Package.

How does the Ultra-W compare with the Ultra-W+?

Both are wheel-legged Aegis models. The Ultra-W+ is the higher-tier configuration, so check the datasheets for the exact differences.

Where can I buy the FX Aegis Ultra-W?

Right here. The FX Aegis Ultra-W is available directly on this page, with quotations available for fleets and institutional orders.

Summary

The FX Aegis Ultra-W turns a robot dog into a patrol vehicle without giving up what makes a quadruped useful. It drives fast and quietly where the ground allows, and steps over the curbs and obstacles that stop wheeled robots. At about 22 kg, open to developers and ready for coordinated fleets and professional payloads, it gives property managers, security teams and researchers more coverage for every charge.