Abstract: An anti-skid tire device for increasing the grip of a tire of a vehicle on a road surface. The device includes a plurality of modules associated with each other to form substantially a chain disposed annularly around the tire's external surface. The modules each have a shaped plate with a plurality of gripping elements protruding during use towards the outside of the shaped plate, so as to improve the tire's ability to grip the road surface. An attachment element is include which has a first end associated with the shaped plate, a second end selectively attachable to a shaped plate of an adjacent module, and a central body radially facing towards the tire and inserted into a corresponding groove provided on the tire's external surface. The attachment element further has at least one adjustment member adapted to adjust the size of the anti-skid device with respect to the tire.

Abstract: Anti-skid device (10) for a tire (13), comprising a plurality of modules (11) associated with each other to form substantially a chain disposed annularly around a circular external surface (12) of the tire (13). Each module (11) comprises a shaped plate (15), substantially plane and provided with gripping elements (17) protruding during use towards the outside, and an attachment element (16) having a first end (22) associated with the shaped plate (15), a second end (23) selectively attachable with a shaped plate (15) of an adjacent module (11), and a central body (25) conformed so as to be able to be inserted with slight interference into a corresponding groove (29) provided on the circular external surface (12) of the tire (13).