Backrest Extension Detachable and Height Adjustable with Clamp 7/8"

The Karman Backrest Extension is an adjustable accessory that increases the height and comfort of a Karman standard back chair or most wheelchairs with 7/8" tubing. It creates a taller, more supportive seating profile, often referred to as a Karman high back, without replacing the entire chair. You get the benefit of extended lumbar and cervical support without investing in a new wheelchair.

With height‑adjustable posts, a padded cushion, and a secure clamp‑on design, it offers a simple way to enhance comfort and support. Many shoppers searching for a Karman high back review or Karman lumbar support solution choose this extension because it upgrades the chair while keeping it lightweight and easy to fold or transport.

The model‑specific extension is designed for Karman S‑Ergo wheelchairs, including the 105, 106, 115, and 305 models. The universal clamp‑on version fits most standard wheelchairs with 7/8" diameter backrest tubing, making it suitable for many Karman standard back chair configurations.

Yes. Two sizes are available to match common wheelchair widths:

• 16" frame :BKR‑EXT‑115‑16 (UPC: 045635099968)
• 18" frame :BKR‑EXT‑115‑18 (UPC: 045635100244)
  
  Both versions share the same height and depth, differing only in width to match the chair.

Many wheelchair users prefer a backrest extension when they want additional upper‑back or head support beyond what a standard back height provides. This type of accessory is often selected to create a more upright seating position, improve overall comfort during extended sitting, or support better posture throughout the day.
People may choose a higher backrest when they:
• Prefer added stability or upper‑back support
• Spend long periods seated and want improved comfort
• Benefit from a taller backrest for posture alignment
• Use accessories such as headrests or positioning supports
• Want to reduce slouching or leaning during daily use
• Need a seating setup that matches their height more comfortably
Backrest extensions are chosen based on comfort, posture, and seating preferences, rather than any specific medical requirement

Key benefits include:

• Increased backrest height
• Height‑adjustable support
• Padded cushion for comfort
• Lightweight, durable construction
• Quick clamp‑on installation
• Easy removal for travel or storage

The Karman High Back / Backrest Extension is designed to increase the overall backrest height and create a more supportive seating experience for users who prefer additional upper‑back or head support. Its adjustable posts allow the extension to be positioned at the preferred height, while the padded cushion adds comfort during extended sitting. The lightweight frame and clamp‑on design make it easy to install, remove, and transport.

Key features include:
• Universal 7/8" clamp‑on fit for most standard wheelchairs
• Height‑adjustable posts for personalized positioning
• Detachable design for quick removal and compact transport
• Soft padded cushion for added comfort
• Lightweight, durable frame suitable for daily use
• S‑Ergo slide‑and‑click option for model‑specific Karman chairs

These features work together to enhance seating comfort by providing a taller, more supportive backrest profile that helps maintain an upright, comfortable posture throughout the day.

Each package includes:

• Backrest Extension Assembly
• 7/8" Clamp‑On Mounting Hardware
• Adjustment Knobs & Fasteners
• Quick‑Start Installation Guide

Mounting Type: 7/8" clamp‑on

Weight: 2lb
Available Widths: 16" and 18"
Dimensions: 21" H × 19" W × 2" D
Color: Black
Model Numbers: BKR‑EXT‑115‑16 / BKR‑EXT‑115‑18
UPC Codes: 045635099968 / 045635100244

Karman generally provides a 1‑year limited warranty for the original purchaser. Standard wear‑and‑tear components, such as upholstery, are typically excluded. For further info on warranty please scroll down to the collapsible tabs option: Karman Warranty.

We offer you a full 30 day returns window provided you substantiate and provide explanation of wrong order or any reason of order return. However we exercise the right to determine our decision in partnership with our supplier. We also vet and ensure the order is verified and that you have placed it in full faith and all details are correct. If you find you have made a mistake at this early stage, we believe this is the easiest way to resolve your issue. However, note that returns made via platform sales take 24-48 hours for a full refund, and so do orders placed directly on our website, or via Shop.

What we expect for a return to be accepted?

Items must be in new, unused condition with original packaging. A restocking fee of 20-25%may apply. We may waive that if its incredibly damaged or if you substantiate with photos and tracking details, to determine that it was not intentionally caused damage after delivery; typically in that case we don't issue a refund if its intentional damage. In most cases we do retain our right to assess restocking fees unfortunately, owing to rising costs today and that which is transferred upon us from our suppliers.

Notify us with pictures as described in our summarized returns policy in the above query and with writing/ email documentation. We will work alongside you to resolve or in most cases replace your faulty or damaged item.

How to Install a Karman Backrest Extension (S‑Ergo & Universal 7/8" Clamp)?

A Note From Our Manufacturing Supplier, Karman Wheelchairs & Healthcare:

Karman Backrest extension: Available in 16" and 18" sizes to correspond to the width of your cushions and wheelchair seat width.

Color: Black

Foldable fits into S-Ergo 105-106-115-305

Padded cushion

Overall dimensions: 21″ H x 19″ W x 2″ D

Back rest extensions for wheelchairs are a great way to accessories and allow further support for your head.  It’s a very unique design that allows the user to further extend support adding comfort to your daily needs.  Please note that this accessory is only useable to certain S-ERGO models and may not be applicable to all models.

It is very easy to put on and take off.  The tools needed are included in and can be easily done by anyone.  If you wish to use this for any other models other than the recommended models, please consult your dealer for installation or other modifications in which can be adaptable to your particular wheelchair.backrest extensions are designed for quick, secure installation using either a slide‑and‑click system (S‑Ergo models) or a universal 7/8" clamp‑on system for standard wheelchairs.

S‑Ergo Backrest Extension Installation (Slide‑and‑Click System)

Compatible with S‑Ergo 105, 115, and 305 models

1. Align the Extension Tubes
Position the extension above the wheelchair’s backrest frame, lining up the tubes with the receiving channels.
2. Slide Down Until It Clicks
Lower the extension into the frame until you hear or feel a “click” indicating it is fully locked in place.
3. Fold for Storage
S‑Ergo extensions are foldable. Once installed, the chair can be folded without removing the extension.

Universal Backrest Extension Installation (7/8" Clamp‑On System)

Fits most standard wheelchairs with 7/8" diameter tubing

1. Attach the Clamps
Place the clamp brackets around the vertical backrest tubes of the wheelchair.
2. Secure the Hardware
Use the included 4mm Allen key to tighten the screws and lock the clamp assembly in place.
3. Adjust the Height
Loosen the height‑adjustment screws, slide the extension to the user’s preferred height, then re-tighten to hold in place. Adjustments are inevitable especially owing to seasonal changes and fixtures creak, just as any home ware or furniture would, it may need re tightening and a wrench is your bestie here.
4. Confirm Stability
Check that all bolts are fully tightened and the backrest does not shift under pressure.

Maintenance & Safety Tips

• Verify Seat Width: Choose the correct size (16" or 18") to avoid frame strain.
• Tools Included: Most extensions include the necessary Allen keys and hardware.
• Check Compatibility: For non‑listed wheelchair models, Karman recommends consulting a dealer before installation.

Yes. Both the 16" and 18" versions use the same 7/8" clamp‑on mounting system and follow identical installation steps.

Yes you can absolutely keep the installed Karman

• The S‑Ergo version folds with the chair.
• The universal clamp‑on version is detachable and can be removed quickly for compact transport or storage.

Most setups are tool‑free or use the included Allen key. The universal clamp‑on version may require tightening a few screws, while the S‑Ergo version installs without tools.

The padded cushion and frame can typically be cleaned with mild soap and water. Avoid abrasive cleaners. Periodically check that the mounting hardware remains securely tightened, especially if the chair is folded often.

The universal version fits most standard wheelchairs with 7/8" tubing. For other models, consult a dealer to confirm compatibility