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Focus man, Focus.,Feb 3 2007, 12:27 PM Wrote:Remember that tractor trailers run on air bags.  They don't have a problem in the winter.  There is an anitfreeze you can get for the air compressor and system.  I am sure it wouldn't be a problem in our climate. 
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That's not always true.. I've seen trucks come in with frozen lines so their bags don't air up. It really depends on what you're driving through and how well you route the lines I think. If you're cautious you shouldn't have a problem, but there's always a chance something could happen.

And Air Ride Technologies always get good reviews in all the magazines, if they make a kit for the Focus that might be a good way to go, if you don't want to have to source all the little parts yourself.