In snowy conditions, Regular tire snow chains were attached to tires to provide maximum traction when driving through snow and ice.

It is suitable only on snow with max speed of 5okm/h(30mile/h), wearable on asphalt, as well as sliding when braking.

Tension adjustment required for chain, if not, it could damage the tire.

New Spider Mechanism is installed on the wheel hub, allowing car to be driven on both dry and snowy ground by spreading the mechanism off or on automatically without stepping out of the car.

When driving on dry road, the mechanism is fold, and regular car speed could be reached.
Uninstalled once a year at the end of snow winter.
May increase car speed for higher than using tire chain.