tirechains.com
If you will be off of the black top, the v-bar are very aggressive. That is what I have.
Buy them based on your tire size. The cam over type tighten up well. Not sure about an F-250, but I can't run chains on my front tires of my 2500 duramax because there isn't any room between the tire and the linkage of the front end. You will want to check before you try so you don't do any damage.