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That is one of the old fables from old that a o-ring chain will rob power. If that is true, then why do all of the cross country riders bikes and quads all use o-ring chains? Go to GT Thunder and look at the dyno run between the 2 chains.
The o-ring's are to keep the mud/water/etc out. o-ring and x-ring are basically the same [img]i/expressions/face-icon-small-smile.gif[/img] The DID gold chains are very good. I will run a 2nd year on my RK o-ring (x-ring) chain[img]i/expressions/face-icon-small-happy.gif[/img]