This will generally come down to personal preference. Many people only put chains onto the traction wheels – i.e. the wheels connected to the engine that actually move the car. So on a 4x4 drive SUV or similar, you’ll need it on all 4 wheels, whilst a normal car you can get away with just the two powered wheels. Some people will put chains onto all the tires, however; even on non-4x4 drive vehicles. It can add to the overall traction and give better handling in some instances, but it’s not strictly necessary. Unless otherwise stated, all the snow chains on our list are sold as pairs.