khe collapse is the strongest i know of , i had a kmc chain that looked alot like a motorbike chain just ridiculas weight , but for peice of mind was good, ive recently came back on the scene and i cant believe riders are putting weight over strengh , ithier people are not pushing there self anymore or just got some serous conhoneys and dont care less if there chain snaps and eat pavment with there pearly whites!