Polycentric Knee Joint with Spring
The Polycentric Knee Joint with Spring is for users approaching walking who need more voluntary control. That control comes from a polycentric mechanism whose CIR trajectory sits very close to the load line.
- CIR trajectory very close to the load line for voluntary control
- At initial contact the knee is locked in a completely extended position
- Studied geometry allows prosthetic shortening during push off to avoid stumbling
- Assisted extension, suitable for different walking speeds through spring stiffness adjustment
- Flexion angle 120 degrees
- Stainless steel or titanium versions, component weight 909 g and 688 g
- Maximum user weight 130 kg
- Tested to ISO 10328
- Warranty 36 months
- Pair with RoadflexionHP to build a key level 3 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.
Community ambulation.
Variable cadence gait (or potential).
Most environmental barriers.
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Code 6.002.02.SPRING Code 6.002.02.SPRING.T |
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| Characteristics |
Flexion angle 120° |
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| Component Weight | 909 g/ 688 g | |
| Material | Stainless Steel/Titanium | |
| Maximum User Weight | 130 Kg | |
Key specifications
| Device Category | Polycentric prosthetic knee joint with spring |
| Mobility Level (K-Level) | K3 |
| Flexion Angle | 120 degrees |
| Material | Stainless steel / titanium |
| Component Weight | 909 g stainless steel; 688 g titanium |
| Maximum User Weight | 130 kg |
| Tested to Standard | ISO 10328 |
| Warranty | 36 months |
| Product Codes | 6.002.02.SPRING, 6.002.02.SPRING.T |
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.