If the chains are breaking, they're probably loose. Like
this: http://metalworking.com/dropbox/chains.jpg.

I've driven literaly hundreds of miles on chains and NEVER
had one break from running. Had some worn 3/4 of the way
through the link when replaced.

These things have to be TIGHT

As in, if you can force a pry bar between chain and tire,
its too loose.

Potholes and cattleguards, are 'nother story, they will
break a link just looking at the chains

gary





Chains won't fit on most newer cars due to suspension and fender
clearance issues. No market for them anymore. Besides, when a chain
fails, it beats the crap out of your car. I've got studded snows for
the Rabbit diesel-goes anywhere as long as is doesn't high-center.
You can always throw cables on the snows too.