The Z-Frame is Not as stiff as the C-Frame or X-Frame, but a good chassis made from glass-filled nylon for comfort and a Carbon Injected knee for that rigidity which reduces the ACL, Meniscus, and MCL injury risk.
Injected Composite chassisSlim hinges for superior bike feelAluminium hinge covers for rigidity and enduranceReduction of forces to limit knee injuriesLow-profile shin bone pad for excellent boot fitComfortable, easy-fitting and low-profile strap systemCustomized fit with interchangeable hinge padding sizesPROP 65 WARNING: Cancer and/or reproductive harm - www.P65Warnings.ca.gov