Equilibrium Prosthetic Foot
Equilibrium is the only single axis prosthetic foot in the world with two springs on the ankle joint, generating an ankle moment and an effective roll-over.
- The only single axis prosthetic foot in the world with 2 springs on the ankle joint
- Posterior spring works during load acceptance: comfort at initial contact and roll-over between heel and forefoot
- Anterior spring, joined with the ankle adapter, works during mid stance for a gradual roll-over
- Carbon fiber and glass fiber laminate generates propulsion energy in mid stance and at toe off
- 30 degrees of plantar-dorsiflexion and 50% efficiency
- Mobility level K3
- Tested to ISO 10328:2016 by Politecnico di Milano
- Aluminum alloy screws and adapter with pyramid in high resistance material
- Carbon and glass fiber laminates cured on autoclave cycle, as in the aeronautical field
- Sizes I to V-LONG, shoe 35-46, user weight 30-130 kg
- Warranty 36 months
Prosthetic foot Equilibrium is the only single axis prosthetic foot in the world with 2 springs on the ankle joint
Tested on ISO 10328:2016 by University Politecnico of Milan
Aluminum alloy screws and adapter with pyramid on high resistance material
Carbon fiber and glass fiber laminates manufactured with autoclave cycle as aeronautical field
Prosthetic foot Equilibrium sizes I and II
| Code | 1.003.02.I | ||
|---|---|---|---|
| Size | I | ||
| Category | Soft | Hard | |
| Shoe number | 35-36 | ||
| Foot length | 23 | ||
| Weight range | 30-69 | 70-100 | |
| Anterior Spring | blue | ||
| Posterior Spring | blue | red | |
| Code | 1.003.02.II | ||
|---|---|---|---|
| Size | II | ||
| Category | Soft | Hard | |
| Shoe number | 37-38 | ||
| Foot length | 24 | ||
| Weight range | 30-69 | 70-100 | |
| Anterior Spring | blue | ||
| Posterior Spring | blue | red | |
Prosthetic foot Equilibrium sizes III and IV
| Code | 1.003.02.III | ||
|---|---|---|---|
| Size | III | ||
| Category | Soft | Hard | |
| Shoe number | 39-40 | ||
| Foot length | 25 | ||
| Weight range | 30-69 | 70-120 | |
| Anterior Spring | blue | ||
| Posterior Spring | blue | red | |
| Code | 1.003.02.IV | ||
|---|---|---|---|
| Size | IV | ||
| Category | Soft | Hard | |
| Shoe number | 41-42 | ||
| Foot length | 26 | ||
| Weight range | 40-79 | 80-130 | |
| Anterior Spring | blue | blue | |
| Posterior Spring | red | yellow | |
Prosthetic foot Equilibrium sizes V and V-LONG
| Code | 1.003.02.V | ||
|---|---|---|---|
| Size | V | ||
| Category | Soft | Hard | |
| Shoe number | 43-44 | ||
| Foot length | 27 | ||
| Weight range | 40-79 | 80-130 | |
| Anterior Spring | blue | blue | |
| Posterior Spring | red | yellow | |
| Code | 1.003.02.V-LONG | ||
|---|---|---|---|
| Size | V-LONG | ||
| Category | Soft | Hard | |
| Shoe number | 45-46 | ||
| Foot length | 28 | ||
| Weight range | 40-79 | 80-130 | |
| Anterior Spring | blue | blue | |
| Posterior Spring | red | yellow | |
Prosthetic foot Equilibrium sizes VI
| Code | 1.003.02.VI | ||
|---|---|---|---|
| Size | VI | ||
| Category | Soft | Hard | |
| Shoe number | 47-48 | ||
| Foot length | 29 | ||
| Weight range | 40-79 | 80-130 | |
| Anterior Spring | blue | blue | |
| Posterior Spring | red | yellow | |
Prosthetic foot Equilibrium: FEM analysis and photos
SIMULATION AND TESTING
Alignment
FUNCTIONALITY AND GAIT Analysis
Key specifications
| Device Category | Single axis prosthetic foot with two-spring ankle joint |
| Mobility Level (K-Level) | K3 |
| Energy Return (Efficiency) | 50% |
| Material | Carbon fiber and glass fiber laminates, autoclave cured |
| Tested to Standard | ISO 10328:2016 |
| Testing Body | Politecnico di Milano |
| Available Sizes | I, II, III, IV, V, V-LONG |
| Warranty | 36 months |
| Product Code Series | 1.003.02 |
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.