FIELD: automotive industry; testing facilities. SUBSTANCE: proposed device has trailer with wheels mounted on two axle-shafts, reduction gear, brake system, and recording unit. According to invention, device is furnished with first and second path transducers coupled with corresponding axle-shafts of trailer. Brake system includes guide member with movable roller installed on reduction gear and secured on end of flexible member whose other end is coupled with axle of trailer. Reduction gear is installed on one of trailer axle-shafts, and outputs of path transducers are coupled with inputs of recording unit. Owing to difference in distances measured by wheels of single-axle trailer, with anti-torque moment of one of which exceeding anti-torque moment of other wheel, result obtained does not depend on road profile, and owing to discrete action of brake system high accuracy information of wheel-road adhesion is provided. EFFECT: provision of accurate results of measurement. 1 dwg
