What is the bite force for a labrador retreaver?

Do not under-estimate the Labrador. I was out walking with my Lab. when I was attacked by 2 adult German Shepherds. My Labrador (Fred) fought them both off. He suffered no injury. Fred was one of the most dependable and gentle dogs I have had, unless a member of his family (Me, my wife, or my 2 little girls) were threatened.