Abstract: A vehicle wheel anti-slip device which is removably mountable on a vehicle for adding traction in snow, ice, etc. The device includes a frame having a generally rigid polygonal shape, a plurality of ground engaging claws including a first leg portion locatable over the perimeter of the vehicle wheel and a second leg portion and at an angle to the first leg portion and locatable over the front side of the vehicle wheel. The device also includes a plurality of support brackets which are pivotally mounted on the frame, and the claws are each pivotally mounted to a respective one of the support brackets. In addition, a tension force device including a tension spring and chords connected to each of the support brackets biases the plurality of claws simultaneously generally towards the center axis of the tire so as to be pressed thereagainst.