by Karman Healthcare (Model No. S-ATX)
The toughest chair for an active user!
List Price: $2,877.00
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Our low price includes:
  • Easy-To-Fold Design
  • Lifetime Limited Warranty
Shipping Information  Details »
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  • Collapsable frame and footplate for easy transport
  • Multiple sleek color choices
  • Strong and lightweight! 

Key Specs

Manuals, Literature & Videos for the S-ERGO ATX

Overview of the S-ERGO ATX

The new S-ERGO ATX from Karman Healthcare has taken the innovation of Ulralightweight Wheelchairs to the next level! This unique frame is made with T6 Aircraft Grade Aluminum, and combines the support and stability needed for larger and stronger users, while still being lightweight enough for smaller and lighter users to comfortably use. The Globally Patented S-Shape Seat Frame provides pressure relief, comfort, and an anti-thrust function for a truly ergonomic design. In order to take your S-ERGO ATX with you anywhere, Karman has designed the frame with a unique crossbrace so your chair will easily collapse. In order to make this chair as smart and easy to use as possible, an auto-adjusting center of gravity shift axle moves as the seat height is adjusted.   

Measuring Guide

View Detailed Measurement Guide
Seat Depth1
Measure from the most posterior point of the body to the inside of the knee, minus at least two inches. Some prefer more leg overhang to make room for their hand when lifting their leg.
Back Height2
Measured from the seat base to the top of the wheelchair back. Depends on how much upper back support is needed, and also affects freedom for the upper body to rotate.
Rear Seat to Floor3
Measurement from the ground to the rear seat edge. Relative to the front seat-to-floor dimension, this determines the rearward slope ("dump" or "squeeze") of the wheelchair seat.
Hanger Angle4
Determines how far the toes extend away from the body, measured from the horizontal. A tighter angle allows the wheelchair to turn around in less space. Depends in part on ability of the knee to bend towards the perpendicular.
Seat Width5
Determined by the widest point of the body from knee to hip, plus an inch to ensure room to move. Consider bulk of clothing, particularly a heavy winter coat, if relevant.
Wheel Camber6
Angle of the wheel relative to the vertical. More camber improves stability and agility, but also limits ability to pass through narrow spaces. A typical daily wheelchair uses three degrees of camber.
Front Seat to Floor7
Measure the leg from the back of the knee to the sole of the foot. Then subtract the thickness of the cushion when it is compressed. Next, add a minimum of two inches for footrest clearance. Do not add the footrest clearance if the wheelchair will be foot-propelled.
Footrest Width8
Measure from the inside of each legrest tubing the distance or desired distance between legrests.
Center of Gravity9
Measure from the front of the seat back post to the center of the rear axel.
Seat to Footrest Length10
Measure from the edge of the seat upholstery to the top rear of the footrest.
Backrest Angle11
Measure the the angle of the back post to the floor. Ninety degrees will be perpendicular to the floor, to approximate the angle from the back post to the seat, subtract two degrees from measurment for every .5" of dump.

More Information on the S-ERGO ATX

+ Details & Specs

Specifications for the S-ERGO ATX

Seat Widths:    14"
Seat Depths:    14"
Seat to Floor Heights:    17" to 20"
Angle-adjustable Back:    Yes
Product Weight:    15.4

Approximate Shipping Dimensions and Weights

Product Weight: 15.4 lbs.
Box 1
Shipping Weight: 40.00 lbs.

Manuals & Literature

More Information on the S-ERGO ATX

+ Warranty

Warranty Information for the S-ERGO ATX


Karman warrants the wheelchair main frame against defects in materials and workmanship for the lifetime of the product, including crossbraces, side frames, backrests frames, from purchase date.  This warranty is extended only to original purchasers of our products. Warranty is not transferable.

Parts or materials which are subject to normal wear and which must be replaced/repaired are the owner’s responsibility and are not covered by warranty. Arm pads and upholsteries are not covered by warranty.

If within such warranty period, any such product is proven to Karman’s satisfaction to be defective, such product shall be repaired or replaced at Karman option. In no case are goods to be returned without first obtaining an R.M.A. (Returned Merchandise Authorization) number issued by Karman and that the part in question is returned insured with freight prepaid to Karman, within the period of warranty. Labor charge incurred in the installation or repair of the above-mentioned parts plus all freight charges are not included in the warranty.

If Karman does not have a completed Warranty Registration Card on file for the consumer’s product, then a copy of the invoice with date of purchase must be provided.  The warranty is void on wheelchairs that have had the serial # tag removed or altered.

Products which have been subject to negligence, abuse, improper storage or handling, improper operation, unauthorized modifications or misuse are not covered by this warranty. Karman Healthcare will not warrant the frame or any parts damaged when the maximum weight limit is exceeded. Warranty applies in the U.S. only.

More Information on the S-ERGO ATX

+ Returns

SpinLife Return Policy for the S-ERGO ATX

This item is custom-made by the manufacturer to suit your specific needs and is therefore non-returnable.

If you have questions about this item please call a SpinLife Expert at 1-800-850-0335.

More Information on the S-ERGO ATX

Customize & Buy


Configure your item below.

Frame Type

Front Seat Height

Rear Seat Height

Center of Gravity Options

Frame Color

Seat Cushions

Back Cane Angle

Back Cane Handles

Back Cane Height

Back Cushions



Rear Wheels

Tire Options

Spoke Color



Chenille Blanket

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