When you change the length of the lower control arm to attain the desired degree of camber, the caster also changes. To reset it you must be able to change the length of the tie-rods. Our special adjustable tie rods are almost twice the diameter of the stock version and are far less likely to bend. Remember, in addition to controlling caster, these tie-rods also control stability under braking! Our own brand have a hexagonal cut on the rod for easy adjustment.