Before you buy chains for the front of a 4x4, check your manual. Some of them don't have enough clearance for heavy chains and some can't use chains at all as they can tear up some very expensive stuff. Some will only allow you to run S chains which are light weight, no V bars, and not nearly as strong as the ones in the pic above.
I run narrower tires than stock. Stock on my 3/4 ton Dodge are 265-70-17. I'm running 245-75-17. They're the same height and weight rating but an inch or so narrower. That gives me lots of room for heavier chains on the front.
