A tire testbed experimental setup is established to investigate the contact phenomenon between tires and sand particles. Several laser sensors are used to capture road sinkage, and a torque sensor is employed to measure the reacting torque of a tire when it runs on a sandy road. LabVIEW is used for the signal processing of laser sensors and a torque sensor. A device like the repose angle test is developed to generate a sandy road regularly. The rolling characteristics of tires on a sandy road are compared with respect to the slip ratio. It should be noted that the braking motion has a deeper sinkage than that in the driving motion. This testbed can be used to predict the tire rolling characteristics under diverse road conditions.