The steering gear may be mechanical, hydraulic, pneumatic, electric or a combination of any of these. In the case of trailers, "steering gear" means all the components which transmit to the steered wh, the two geared members attached to the steering column and the drop-arm spindle respectively. They transmit motion from the steering-wheel to the stub axles through the drop arm, steering rod or drag , hammasmehhanism, mis muudab rooli pööramise edasi-tagasi liikumiseks