A device and method for measuring friction on a surface, such as a road, allow for accurate and reliable measurements by preventing the slipping of a pilot wheel. The device includes a pilot wheel and a measurement wheel mounted on shafts in a wheel box and arranged one behind the other, the pilot wheel rotating without slip and the measurement wheel being braked in order to provide slip. The configuration of the device, including the positioning of an attachment axle, results in the pilot wheel being subjected to greater ground pressure than the measurement wheel, thus preventing slipping of the pilot wheel.