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Active Lifestyles Require Prosthetics That Can Keep Pace

The Crossover™ G3 Infinity Knee is a monocentric prosthetic knee that can be used for general ambulation — AND — with simple adjustments — transforms into a dynamic prosthetic for the most demanding athlete. No matter what Mother Nature throws at it — Dirt, Water, Snow the G3 Infinity Knee continues to perform. Never worry about losing functionality from a dead battery or an overheated microprocessor.


Ambulation knees are only good for walking and athletic knees generally are not. That’s a big problem for user's with real life transitions between activities.


Rebuilt from the ground up for 2020  with increased robustness and longevity the G3 Infinity Knee bridges that gap as the world’s first hybrid knee delivering high performance in all activities.


Don't Let Life Define Your Limitations




Technological Innovation


At the heart of the proprietary Crossover™ X/CAM™ System is the Tendon, delivering smooth energy absorption and return. Designed to mimic the natural body, the X/CAM™ System is what makes it possible to maximize extension / flexion moments associated with high impact athletic activities.

The advanced pneumatic / hydraulic shock provides an enormous range of options for making micro-adjustments "on the fly" in response to changing environments or activities.  The X/CAM™ System and Crossflex™ Wedges provide additional dampening and rebound during all ambulation and athletic movements.


Preflexion wedges are designed to act like knee cartilage providing compression absorption and reducing stress on the user's residual limb. NO TOOLS required for installation and adjustments to flexion angle / position can be made during high impact activities. Preset at 20° | 30° | 40° 


*Also available in Polyurethane for users requiring increased support at knee axis.

75 durometer-rated Variable Extension Dampening "VED" bumpers are designed to act like knee cartilage stabilizing the mechanical structure of the knee, providing increased stress absorption enabling maximum flexion and extension in all activities.

*Also available in 85 durometer-rated bumpers for users requiring increased support at knee axis.

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Ultra Lightweight 6061-T aircraft aluminum frame with stainless steel inserts and Oilite™ self-lubricating bushings with graphite plugs.

* No maintenance with increased durability
* Smooth motion in light use or heavy impact situations
* All parts serviceable



Crossover™ G3 Infinity Knee Manual



Amputation Level:

Transfemoral | Knee Disarticulation

Impact Level:

Moderate or Extreme

Maximum Patient Weight:

125kg (275lbs)

Weight of Knee with Tendons:

908g (2lbs)

Build Height:

213mm (8.38")

Knee Flexion:

8° to 150°

  • Why is the Crossover™ Hybrid Knee not for sale in Canada?
    Unfortunately at this time, Leftside Industries does not possess a Medical Device License for product distribution in Canada. We apologize to our Canadian friends for this circumstance and look forward to rectifying in the near future.
  • Does the Crossover™ Hybrid Knee require maintenance?
    Yes, like all prosthtetic devices, the Crossover™ Hybrid Knee is subject to wear and tear and should be routinely inspected, especially before participating in high-activity sports. Please refer to the User's Manual, pages 20-21.
  • How can I share my personal story and experience with the Crossover™ Hybrid Knee?
    Our Gallery page is dedicated to our Heroes who do not let life define their limitations. You can share your story and photos by emailing directly to or posting to our Facebook page. We very much want to read and share your experience!
  • How do adjust the settings on my Crossover™ Hybrid Knee to maximize my performance during various activities?
    Please refer to and download the quick reference performance card on the home page. You can also review our Baseline Activity Recommendations Chart in the User's Manual on pages 17-19. You can always contact us directly too and we will do our best to assist you in maximizing your potential.

Reimbursement Codes











Note: Responsibility for accurate coding lies solely with the provider treating the patient. Leftside Industries Inc. assumes no responsibility or liability for the provider’s coding decisions. Leftside Industries Inc. coding suggestions rest on its best judgment and are subject to revision based on additional information or changes in the alpha-numeric system.

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