Polycentric Knee Joint Compact
The Polycentric Knee Joint Compact is designed for users approaching walking, with a variable CIR (center of instantaneous rotation). Safety is achieved through the polycentric mechanism, and the studied geometry allows prosthetic shortening during the push off phase to avoid stumbling.
- Variable CIR polycentric mechanism for outstanding safety: at initial contact the knee is locked in full extension
- Studied geometry allows prosthetic shortening during push off to avoid stumbling
- Assisted extension, suitable for different walking speeds through spring stiffness adjustment
- Thanks to the pyramidal adapter it is possible to change the CIR position relative to the load line, trading safety against voluntary control
- Flexion angle 141 degrees (titanium and children versions) or 135 degrees (stainless steel version)
- Component weight 516 g, 370 g or 700 g depending on version
- Maximum user weight 130 kg
- Tested to ISO 10328
- Warranty 36 months
- Pair with a Single Axis foot or Walking MP to build a key level 2 above knee prosthesis
Very high CIR and close to the hip, low fatigue to start flexion.
Posterior CIR to the load line.
Very closed CIR to the load line, good for voluntary control.
POLYCENTRIC KNEE JOINT SYSTEM
Thanks to the pyramidal adapter suitable for each knee, it’s possible to change the CIR position compared to the LOAD LINE in order to offer users more safety or more voluntary control.
Limited community ambulation.
Able to traverse low-level environmental barriers (curbs, ramps, stairs, uneven surfaces).
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Code 6.002.01.T |
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| Characteristics | Flexion angle 141° | |
| Component Weight | 516 g | |
| Material | Titanium Gr. 5 | |
| Maximum User Weight | 130 Kg | |
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Code 6.002.01.k |
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| Characteristics |
Flexion angle 141° |
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| Component Weight | 370 g | |
| Material | Aluminum alloy 7075 + Stainless Steel (pyramid) | |
| Maximum User Weight |
100 kg |
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Code 6.002.01.SS |
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| Characteristics |
Flexion angle 135° |
|
| Component Weight | 700 g | |
| Material | Stainless Steel | |
| Maximum User Weight | 130 kg | |
Key specifications
| Device Category | Polycentric prosthetic knee joint |
| Mobility Level (K-Level) | K2 |
| Flexion Angle | 141 degrees (titanium, children); 135 degrees (stainless steel) |
| Material | Titanium grade 5; aluminum alloy 7075 with stainless steel pyramid |
| Component Weight | 516 g / 370 g / 700 g depending on version |
| Maximum User Weight | 130 kg |
| Tested to Standard | ISO 10328 |
| Warranty | 36 months |
| Product Codes | 6.002.01.T, 6.002.01.SS, 6.002.01.k |
Ordering and technical support
Designed and manufactured in Italy by Roadrunnerfoot Engineering S.r.l. The full range is listed in the Roadrunnerfoot 2025 catalogue. Orthopedic technicians, clinics and international distributors can request technical data sheets, product codes, pricing and fitting support from our team.