Classic automatic 4 x 4 chains are easier but not necessarily quicker to use than Power / "Grip V" 4 x 4 chains. They're made from better quality steel, but an important element of the price difference for the average ski driver is convenience - you don't need to kneel down on the ground during the fitting process. They also appeal to people who just appreciate the technology.

• The 'automatic' element is that there's no need to grovel around in the snow at ground level while you push a standard chain around the back of the wheel, no need to join a cable together and then push it over the top of the wheel (which is where the "limited clearance" issue is important). With Classic automatic 4 x 4 chains you just push the hoop holding the chains over the top of the wheel, drive forward a quarter turn so the tensioning chain and behind-the-wheel pulley system is visible, and then pull the tensioning chain tight before wrapping it out of the way.
• Click here to see a movie of these chains being fitted (11.8 MB). This shows the automatic car chain; this 4 x 4 version is a lot beefier all round.
• Classic automatics 4 x 4s are made of a fine-grain chromium manganese alloy steel, producing a stronger steel hoop, and better quality links, than the Power / "Grip V" 4 x 4 chains.
• They also have a reversible chain mesh for a long lifetime (but don't grind them down on the tarmac!)
• They're supplied in a smart strong zipped waterproof ballistic nylon carrying case 50 x 50 x 4cm, so pack flat in your vehicle.

We rate these chains very highly for ease of use, but they've also scored very high marks in test results for their traction, durability, tracking, braking distance and smoothness of running. If you're tempted to buy any chain more expensive than a Power / "Grip V" 4 x 4, you'll need to decide between these automatic 4 x 4 chains and a Kantenspur. The Kantenspurs are fitted in the same way, but have links across the face of the chain to improve overall performance, and are made of even better quality steel. You'll see that Kantenspurs are also much more expensive, so unless you intend to use chains for prolonged periods, across rough terrain, our recommendation is that you'll find these Classic automatic 4 x 4s to be quite sufficient.

Why choose RUD? Simple - they're reckoned to be the best. But don't just take our word for it; RUD are official suppliers to Audi, BMW, Jaguar, Landrover, Mercedes, Saab, Volvo, and VW, amongst others, and also supply the British Army - ample evidence that their snow chains are as good as they come.

Buy a set of chains from us this season and we'll give you, for a nominal charge of 10p, a useful free torch; check the link below for further details. We're also showing you a range of other useful ski-drive products.