Do you need chains on all 4 tires with AWD?
Requirement 2 (R2): Chains or traction devices are required on all vehicles except four-wheel/all-wheel drive vehicles with snow-tread tires on all four wheels.
Do you need 4 tire chains on 4wd?
Legally, it is only necessary to have snow chains for one axle when travelling in mountain areas. However, when driving a 4 x 4 some drivers prefer to use 4 chains (two sets). Although in most conditions a single set of chains will provide enough traction, there are significant benefits with using two sets.