the facts about O ring and non O ring chains from a test done in a motorcycle magazine a few years ago.. they did a test on non o ring chains and found that after about 20 miles of riding the chain got hot enough that the lubrication in the links actually ran out of them and caused more friction and there for caused more drag and took more power to turn the wheel than the o ring chain because the o ring kept the lubrication in the links and made it easyer for the wheel to turn ...