Abstract: A stud unit (3) and a device (1) for a studded tire. The stud unit comprises a housing (5) with a chamber (7) enclosing a medium, a stud (20) arranged at least partly inserted into the chamber so that it is affected by the medium. The stud is adapted to be moved depending on a change of the pressure of the medium in the chamber between a first position for a first pressure and a second position, where the second pressure is higher than the first pressure. In the second position a part of the stud protrudes further from the chamber than in the first position, The stud unit also contains a heating element (22) adapted to heat the medium so that the pressure in the chamber is adjusted between the first pressure and the second pressure.

Abstract: Embodiments provide a pressure sensitive foil, a tire pressure sensor module, a tire, a method and a computer program for determining information related to deformations of a tire. A pressure sensitive foil configured to determine information related to deformations of a tire. The pressure sensitive foil comprises an interface configured to provide the information related to the deformations of the tire to a control device. A tire pressure sensor module is configured to provide information related to deformations of a tire to a control device. The tire pressure sensor module comprises an interface configured to determine the information related to the deformations of the tire from a pressure sensitive foil.

Abstract: The present invention is a system for controlling the dynamic performance of wheels on an agricultural vehicle. A sensor is mounted on the agricultural vehicle that generates a signal corresponding to the deflection of the tire as the wheel is traveling along a surface. A controller receives the signal corresponding to the deflection of the tire and generates a control signal to an air regulator to either supply additional air to or remove air from the tire. An additional sensor may provide a signal corresponding to a variable load carried by the agricultural vehicle. An accelerometer may also be mounted on the agricultural vehicle and provide to the controller a signal corresponding to acceleration perpendicular to the surface. The controller is further configured to generate control the air regulator as a function of the varying load on the agricultural vehicle and/or based on the signal from the accelerometer.