Polycentric 4-Bar Locking Knee

The L1321 Polycentric 4-Bar Locking knee from ST&G provides the inherent stability and safety of a polycentric design in a lightweight and functional build, with the added security of a locking option. This knee provides lower activity users the safety they need to walk with confidence. There are two proximal adapter versions – male pyramid and lotus lamination adapter

Features and benefits

  • Polycentric locking knee
  • Independent swing flexion and extension adjustment
  • Superlight aluminium alloy frame construction.
  • Proximal attachment has 2mm of A/P, M/L slide and rotation adjustment.
  • Adjustable extension assist.

Technical Specifcation

ProductWeight LimitBuild HeightProximal AdapterDistal AdapterProduct WeightMax Knee FlexionActivity LevelWarranty
L1321AP125kg108mmMale pyramid30mm tube adapter651g135 degreesK1-K22 years
L1321AL125kg114.3mmLotus adapter30mm tube adapter672g135 degreesK1-K22 years
Torque ValuesTorque (Nm)Hex key
M6 Cap Screw125mm
M10 Bolt248mm

Ordering Information

DescriptionProduct Code
Polycentric 4-Bar Locking Knee – Pyramid adapterL1321AP
Polycentric 4-Bar Locking Knee – Lotus adapterL1321AL
Replacement Pyramid adapterPA13
Replacement Lotus adapterLA13
Lanyard for locking kneeLY13