Abstract: A vehicle tire has a plurality of first marks arranged in a circular pattern on a radially outer area of the vehicle tire. A plurality of second marks is arranged in a circular pattern on a radially inner area of the sidewall. Passing of the first and second marks is detectable by magnetic or inductive sensors. The derived signals are used to determine the longitudinal force acting on the tire or the tire spring travel or the footprint length or the load/pressure ratio during rotation of the tire.

Abstract: A method for determining a longitudinal force acting during tire rotation on a tire mounted on a wheel rim includes the step of determining the torsional deformation of the tire, which is a function of the location of measurement, between a radially inner area of the wheel or the hub and a radially outer area of the tire in at least one non-rotating position. At least two marks are positioned at the wheel on different radii relative to an axis of rotation of the wheel, wherein a radially outer mark is positioned on a radially outer area of the tire. At least two sensors are non-rotatingly arranged in the vicinity of the wheel so as to be positioned on the different radii, wherein a radially inwardly arranged sensor is connected to a steering knuckle and a radially outwardly arranged sensor is connected to a transverse suspension arm of the wheel suspension. For the rotating wheel at least one time period between passing of the at least two marks at the at least two sensors is recorded.