So what's the difference between an O-ring and non O-ring chain. And all the chain sellers are advertising how strong their tensil strenth is. I want a green colored chain and says it's a non O-ring 8,200 tensil strength chain. It's inexpensive, nearly half the price of the EK chain 8,000 tensil strength (which put on the 200x's and rusts very, very quickly), so who's the chain expert?-Robby