This is our chart with all the breaking strengths:
http://www.masterpull.com/cpage.cfm?cpid=197
-Alex
Since you have a 12k winch (according to your signature) I would suggest a line rated to at least 18k, such as 3/8ths Master-Pull basic winch rope, or 3/8ths AmSteel Blue. A stronger and more durable option is Master-Pull 5/16th's Superline (or Superline XD) rated at 21,000lbs.
A good thing to remember is that not all ropes are created equal, cheap knockoffs are being created around the world today, the fibers they are made out of are not as durable or as strong as a genuine SK75 Dyneema that all of the ropes we sell are made out of.
-Alex
http://www.vikingoffroad.com/ supplied me with 90' of 7/16" rope for my 12K winch on the Power Wagon. I chose the Safety Thimble over the other options - having used one extensively on my Taco, I prefer it over a hook or thimble. While the 3/8" rope is plenty strong, I wanted the extra strength of the 7/16 @ 21,500 MBS.
Mark
I have a 12k Warn and its loaded with Master-Pull 3/8th's Superline. I've always received great service from M-P and they are usually the first place I look for winch lines.
The newest winch line in our family is my father's XD line which makes it the third M-P line we've bought.
master pull looks graet exept for a couple down sides. 1. that you have to buy the chafe gaurd sepprately make me wonder if i can spool the line with the chafe gaurd on to protect the line before i can get a winch cover. 2. the hook, if it breakes is there a way to replace it or wil i have to use the factory hook or a d-ring?