Do I need 4 snow chains on a 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. NOTE: (Four-wheel/all-wheel drive vehicles must carry traction devices in chain control areas.)
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.
Do you put chains on all four tires for AWD?
For an all-wheel-drive vehicle the best option is to use chains on all four tires as long as the vehicle manufacturer does not prohibit this, but if only one pair is used they should go on the front. (This is because when the vehicle is braking momentum tends to push the vehicle weight forward onto the front end.)