Kingpins give absolute reliability to this front end. JD built its steering knuckles around readily available Kartek spindles and hubs. Aurora rod ends are used to connect the tie rods to the JD knuckles. The JD design is both smart and well executed: The rod end is mounted to the knuckle in double shear (the fixing bolt goes through mounting tabs on both ends instead of just one), and the rod end's shank is held in place by both a jam nut and a pinch bolt. The red urethane spacers keep the rod end centered in its mounting clevis. No misalignment spacers are used, which means a bigger bolt can pass through the rod end. Bottom line: big-time strength.