I was wondering if anyone has purchased and/or used chains on their X yet in the snow? I am moving back to Colorado in a few weeks and plan on doing some skiing. I like to have chains just in case. I did a search but it doesn't seem that anyone has actually used them on the X. If anyone has, please let me know what kind you purchased, where, and if you encountered any problems with them such as clearance issues. Also, and this is probably a stupid question, if your in 4 wheel drive do you need chains at all 4 wheels or just the rear?