Karman S-ERGO ATX Active Wheelchair
The Karman S-ERGO ATX Active Wheelchair is an ultra-lightweight, high-performance manual wheelchair engineered for active users who demand exceptional responsiveness, adjustability, and comfort. Built with premium materials and advanced engineering, the S-ERGO ATX combines a lightweight 6061 T-6 aircraft-grade aluminum frame with Karman’s patented S-ERGO ergonomic seating system to deliver outstanding propulsion efficiency, superior posture support, and a customized fit for everyday mobility.
Weighing as little as 26 pounds with standard components and featuring an ultra-light 15.4-pound frame, the S-ERGO ATX offers remarkable maneuverability without sacrificing durability. Its innovative multi-geometrical extruded crossbar design increases frame rigidity and energy transfer, allowing users to enjoy more efficient propulsion, responsive handling, and long-lasting performance.
Designed for personalized performance, the S-ERGO ATX offers extensive adjustability to match individual needs. Users can customize the center of gravity, seat height, backrest height and angle, front fork position, footplate height, and footrest angle to optimize balance, comfort, propulsion efficiency, and control. Every wheelchair is individually configured by skilled technicians to provide an exceptional fit and riding experience.
Comfort remains a priority thanks to Karman’s globally patented S-Shape Ergonomic Seating Frame, which promotes healthier posture, reduces pressure points, and enhances long-term seating comfort. Tension-adjustable seat and back upholstery allow additional customization, while flip-back armrests and a one-piece folding footplate simplify transfers and everyday accessibility.
Finished with a durable Metallic AEGIS® high-gloss coating, the S-ERGO ATX blends modern styling with exceptional durability. Available in multiple seat widths and depths and supporting users up to 275 pounds, it delivers the lightweight performance, ergonomic comfort, and precision handling active wheelchair users expect.
The S-Ergo ATX Is Ideal For:
✔ Active everyday mobility
✔ Independent wheelchair users
✔ Work and school
✔ Indoor mobility
✔ Outdoor paved surfaces
✔ Rehabilitation
✔ Long-term wheelchair users
✔ Individuals seeking customizable performance
✔ Users requiring ergonomic seating
Key Features & Benefits
-
Ultra-Lightweight Active Wheelchair
Engineered for active users seeking premium performance and mobility.
-
Weighs as Little as 26 lbs.
Lightweight design makes transportation and maneuvering easier.
-
Ultra-Light 15.4 lb Aircraft-Grade Aluminum Frame
Delivers exceptional strength with minimal weight.
-
Patented S-ERGO Ergonomic Seating System
Promotes healthier posture while reducing pressure points.
-
6061 T-6 Aircraft-Grade Aluminum Construction
Provides outstanding durability and long-term reliability.
-
Multi-Geometrical Extruded Crossbars
Increase frame rigidity for improved propulsion efficiency and responsiveness.
-
Adjustable Center of Gravity
Customize balance and handling to match your riding style.
-
Adjustable Front & Rear Seat Heights
Optimize seating position for comfort and performance.
-
Adjustable Backrest Height & Angle
Provides personalized ergonomic support.
-
Adjustable Front Fork Position
Fine-tunes maneuverability and ride characteristics.
-
Unlimited Footrest Angle Adjustment
Allows precise lower-leg positioning for improved comfort.
-
Adjustable Footplate Height
Accommodates a wide range of user preferences.
-
Tension-Adjustable Seat & Back Upholstery
Creates a customized seating experience with enhanced support.
-
Flip-Back Armrests
Simplify transfers and improve accessibility.
-
One-Piece Foldable Footplate
Makes folding and transportation more convenient.
-
Metallic AEGIS® High-Gloss Finish
Provides a premium appearance with durable protection.
-
Available Seat Widths: 14”, 16”, & 18”
Multiple sizing options ensure an optimal fit.
-
Available Seat Depths: 16” & 18”
Choose the seating depth that best matches your needs.
-
Supports Users Up to 275 lbs.
Strong lightweight frame delivers dependable everyday performance.
-
HCPCS Codes: K0005 / E1236*
Qualifies under applicable HCPCS coding classifications.
Specifications
S-ERGO ATX Technical Specifications
| HCPCS Code |
K0005 / E1236* |
| Seat Width Options |
14", 16", or 18" |
| Seat Depth Options |
16" or 18" |
| Armrest Height |
8.5" |
| Back Cane Angle |
85°, 90°, or 95° |
| Front Seat Height |
17", 18", 19", or 20" |
| Rear Seat Height |
16", 17", 18", or 19" |
| Overall Height |
29" – 38"
(Dependent on Seat Height and Selected Options) |
| Overall Open Width |
21", 23", or 25" |
| Overall Length |
36" |
| Folded Width |
14" |
| Weight (Standard Configuration) |
26 – 30 lbs |
| Weight Capacity |
275 lbs |
| Shipping Dimensions (L × H × W) |
38" × 32" × 16" |
⚠ WARNING: This product may expose you to chemicals, including [specific chemical name if known], which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Downloads
Download The User Manual
FAQs
Frequently Asked Questions (FAQ) – Karman S-ERGO ATX Active Wheelchair
Tap a question below to view the answer.
What is the Karman S-ERGO ATX?
The Karman S-ERGO ATX is an ultra-lightweight active manual wheelchair designed for users seeking exceptional maneuverability, customizable performance, and ergonomic comfort. It features Karman’s patented S-ERGO seating system, an aircraft-grade aluminum frame, and extensive adjustability.
How much does the Karman S-ERGO ATX weigh?
The wheelchair weighs approximately 26 to 30 pounds with standard components, depending on the selected configuration.
The frame itself weighs only 15.4 pounds, making it exceptionally lightweight for loading and transport.
What is the maximum weight capacity?
The S-ERGO ATX supports users weighing up to 275 pounds.
What makes the S-ERGO seating system unique?
Karman’s patented S-ERGO seating frame features an ergonomic S-shaped design that helps:
- Promote better posture
- Improve sitting comfort
- Reduce pressure points
- Minimize sliding forward in the chair
- Support long-term seating
What material is the frame made from?
The S-ERGO ATX is constructed from 6061 T-6 aircraft-grade aluminum, offering an outstanding balance of strength, durability, and lightweight performance.
What are the available seat widths?
The wheelchair is available in:
- 14 inches
- 16 inches
- 18 inches
What seat depths are available?
Is the wheelchair adjustable?
Yes. The S-ERGO ATX offers extensive adjustability, including:
- Center of gravity
- Front seat height
- Rear seat height
- Backrest height
- Backrest angle
- Front fork position
- Footplate height
- Footrest angle
These adjustments allow users to customize the chair for optimal comfort and performance.
What backrest angles are available?
The backrest can be adjusted to:
Can the center of gravity be adjusted?
Yes. The adjustable center of gravity allows users to fine-tune the wheelchair’s balance, maneuverability, and propulsion efficiency.
Are the seat and back upholstery adjustable?
Yes. The chair features tension-adjustable seat and back upholstery, allowing users to customize support and seating comfort.
Does the wheelchair have flip-back armrests?
Yes. Flip-back armrests make transfers easier while improving accessibility.
Does it include a folding footplate?
Yes. The S-ERGO ATX comes standard with a one-piece foldable footplate for convenience and easier transport.
Can the footrest angle be adjusted?
Yes. The footrest offers unlimited angle adjustment, allowing users to find the most comfortable leg position.
Is the footplate height adjustable?
Yes. The footplate height can be adjusted to accommodate different leg lengths and seating preferences.
What makes the frame so rigid?
The wheelchair utilizes multi-geometrical extruded crossbars, which increase frame rigidity, improve energy transfer, and enhance overall driving efficiency.
Is the wheelchair easy to transport?
Yes. Its lightweight construction and folding design make it easy to lift, transport, and store in most vehicles.
Is each wheelchair custom fitted?
Yes. Every S-ERGO ATX frame is configured by Karman technicians based on the selected specifications to provide an optimal fit and performance.
What finish does the wheelchair have?
The frame features a Metallic AEGIS® high-gloss finish, providing both durability and an attractive appearance.
What are the overall dimensions?
Depending on the configuration:
- Overall Length: 36”
- Overall Height: 29”–38”
- Overall Width: 21”, 23”, or 25”
- Folded Width: 14”
Is the S-ERGO ATX suitable for everyday use?
Yes. It is designed for:
- Daily mobility
- Work
- School
- Home use
- Community activities
- Long-term wheelchair users
Who is the Karman S-ERGO ATX ideal for?
The S-ERGO ATX is an excellent choice for:
- Active wheelchair users
- Individuals seeking maximum adjustability
- Users wanting lightweight performance
- People requiring ergonomic seating
- Long-term manual wheelchair users
- Individuals looking for a highly customizable chair
What HCPCS codes apply to the S-ERGO ATX?
The Karman S-ERGO ATX is associated with:
- K0005
- E1236* (when applicable)
Why choose the Karman S-ERGO ATX Active Wheelchair?
The Karman S-ERGO ATX combines ultra-lightweight construction, premium ergonomic seating, and exceptional adjustability into one high-performance manual wheelchair. Its 15.4-pound aircraft-grade aluminum frame, patented S-ERGO seating system, customizable center of gravity, adjustable seating geometry, and rigid crossbar design deliver outstanding efficiency, comfort, and control. Whether you’re navigating daily life, working, traveling, or pursuing an active lifestyle, the S-ERGO ATX is engineered to maximize independence, mobility, and long-term comfort.
Warranty
KARMA Warranty Policy
1. Warranty Coverage & Duration
• Free repair is provided for manufacturing defects or faulty components within the warranty period (warranty repair).
• Warranty repairs must be performed by authorized KARMA dealers only.
• Transportation costs for repairs or replacements are not covered.
• Replaced parts become the property of KARMA.
2. Items Not Covered by Warranty
• Minor irregularities that do not affect function or safety.
• Normal wear and tear.
• Issues due to lack of basic maintenance and self-inspection.
• Damage caused by improper use or failure to follow operating guidelines.
• Installation or use of non-KARMA parts.
• Damage from unsuitable environments.
• Unauthorized modifications, additions, or alterations.
• External factors such as chemicals, oil, or debris.
• Natural disasters.
3. Costs Not Covered by KARMA
• Replacement or refill of consumable parts, oil, or lubricants.
• Inspection, adjustments, or cleaning services.
• KARMA-designated self-inspection costs.
4. User & Dealer Responsibilities
User Responsibilities:
• Follow all operation guidelines in the manual.
• Perform regular self-inspections and basic maintenance.
• Keep maintenance records.
• Avoid unauthorized modifications or use of non-KARMA parts.
• Read and understand the manual thoroughly.
Dealer Responsibilities:
• Educate users on operation and maintenance.
• Verify warranty eligibility.
• Provide warranty information and improvement recommendations.
5. Additional Stipulations
• Consumable parts (e.g., tires, casters, seat cushions, backrest cushions) are not covered by the warranty.
For further details or warranty claims, please contact your authorized KARMA dealer.
FREE Shipping
30-Day Return Policy
24/7 Support
FSA/HSA Eligible
20% off
24% off
24% off
