Recommendations on using automatic snow/ice chains on a 4x4

[aedelectric]

Looking for recommendations on adding automatic snow / ice chain systems on 4x4, such as OnSpots or RUD Chain USA.  What are some of the concerns with using these systems on 4x4 heavy duty trucks.  Would they void the manufacture's warranty?  What additional maintenance would be needed when they are added.  And lastly, is there hype worth the investment.

Thanks!

[Moses Ludel]

aedelectric...Chains may be an acceptable accessory unless they become the direct cause of a warranty-covered parts failure.  Most states consider a 4x4 with "Snowflake"-rated winter tires at all four wheels safe.  For example, at California passes, a two-axle (up to one-ton rated) 4x4 vehicle with these tires can usually go through a chain control area without the need to "chain up".  "Big rigs" with a trailer in tow must chain up.  Regarding types of chains, when you do need them, you should consult the chain manufacturer about the recommended vehicle applications and how that affects the chain warranty...Tire manufacturers are also concerned about chain use and may void a damaged tire from warranty coverage if the cause is the use of chains.

Your vehicle manufacturer would make a judgement call about chain use on specific models.  The owner's handbook will generally discuss winter driving and accessories.  The vehicle manufacturer's parts departments should also be versed on whether chains are okay or not. 

Chains do make a difference on ice.  Some owners and fleet operators prefer allocating a set of studded winter tires for winter use at snow country.  Here, the tires must be designed to accept studs. 

The OnSpot chains are a novel idea and design.  They essentially throw continuous rows of chain down in front of the tires, and the tire rolls over the chain.  Working independently of the tire, there is no reliance on vehicle systems beyond the electrical power source for the motor(s) and the controls.  Framework/mounting is involved, and a mounting kit with heavy duty cable/wiring would be essential (professionally installed)...To be sure, I would still consult your vehicle manufacturer before considering the OnSpot approach.   OnSpot is popular on medium duty trucks and school busses.  

Moses