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The Ultimate Ultralight Active Wheelchair for Bold, High-Performance Living
The Karman S-ERGO ATX Ultralight Active Wheelchair is engineered for those who live boldly and demand performance without compromise. Designed with advanced multi-geometrical extruded cross bars, the ATX delivers exceptional agility, rigidity, and style in one sleek package.
Its compact frame design and fully adjustable footplate angles make it ideal for users seeking both customization and superior comfort. Backed by years of intensive research and development, this wheelchair features precisely optimized tubing, expert welding, and high-performance components to achieve the best strength-to-weight ratio in its class.
Each frame is meticulously crafted to individual order specifications, offering unmatched stability for larger users while remaining incredibly lightweight for smaller individuals. The S-ERGO ATX doesn’t just move—it transfers your energy effortlessly to the street, embodying ultimate style, comfort, and expression in every ride.
Precision Engineering Meets Ultra-Light Performance: Key Features of the Karman S-ERGO ATX Wheelchair
- S-Shape Design: Globally patented S-Shape ergonomic seating frame, supporting pressure relief and anti-thrust posture.
- Folding / compact design: The frame and footplate fold to ~14" width for portability and transport.
- Frame Material & Finish: Made from 6061 T-6 aircraft-grade aluminum, providing a high strength-to-weight ratio. The frame is finished with metallic high-gloss paint treated with Aegis™ antimicrobial coating for added durability and hygiene.
Karman S-Ergo ATX Wheelchair Specifications
| Seat Width | 14, 16, 18 in. |
| Seat Depth | 16, 18 in. |
| Frame Color | Fashion White or Diamond Black |
| Rear Wheels | Quick Release Pneumatic 36 Spoke 24x1 in. Wheels |
| Front Seat Height | 17 in. Front Seat Height |
| Rear Seat Height | 17 in. Rear Seat Height |
| Center of Gravity | 0 Degrees Rear Wheel Position: Standard |
| Back Cane Height | 10.5 in. Back Post Height |
| Back Cane Angle | 90 Degrees Back Post Angle: Standard |
| Footplate Height | 14 in. Footplate Height |
| Front Casters | 5x1 in. Flat Free Polyurethane Casters with Polished Aluminum Hub |
| Armrest | Flip Back |
| Weight Capacity | 275 lbs. |
| Frame Weight | 15.4 lbs. |
Karman S-Ergo ATX Wheelchair Warranty
Frequently Asked Questions (FAQs)
What is the weight of the frame and the overall wheelchair when fully outfitted?
The bare frame of the S-ERGO ATX starts at 15.4 lb., making it exceptionally lightweight. With standard components, seating, wheels, and accessories, the total weight typically falls between 26 lb. and 30 lb. depending on configuration.
What is the maximum weight (user capacity) the wheelchair can support?
The S-ERGO ATX is rated to support users up to 275 lb.
Is the S-ERGO ATX foldable and portable for transport?
Yes — one of its design features is a foldable frame and footplate, allowing the chair to collapse for easier transport and storage. Because of its compact folded width (≈ 14″) and lightweight structure, it is more travel-friendly than many rigid-frame sport chairs.
What is the frame material, and how does it contribute to performance?
The frame is constructed from 6061 T-6 aircraft-grade aluminum, chosen for its excellent strength-to-weight ratio. This material allows the chair to remain lightweight (frame weight ~ 15.4 lb.) while still delivering structural rigidity and responsiveness.
What is the “S-Shape” ergonomic seating frame, and what benefits does it offer?
The globally patented S-shape seating frame provides built-in support for posture, pressure relief, and anti-thrust (to reduce forward sliding). It helps maintain a more natural spinal curvature and improves seated stability over long durations.