I recently purchased a Regina ORN o-ring chain and JT steel sprockets. When the sprockets showed up, I was stunned by how heavy the rear one was. Previously, I've always used alloy. This time I succumbed to the "spend less and get longer life" pitch for steel sprockets. But after feeling that back sprocket in my hand, I simply couldn't install it. Adding 2 additional pounds to the back hub is a terrible thing to do if you're concerned about bike performance. Standing there with the steel sprocket in my hand, it occurred to me that people spend mega
-bucks to lose a pound. And this thing would add 2 pounds of weight to the worst place on my bike - unsprung weight near the maximum leverage point. I just couldn't do it. I sent it back.
I struggled with whether to order a Renthal
(what I've virtually always used before) or an Ironman. When I first got my bike, I wanted to try different gearing, so I went the cheap route and tried a Titax 49 on the back. It was destroyed after just a few rides. The pathetic stock chain may have contributed, but I wasn't pleased with the life of the Titax. A Sunstar
lasted about 9 months (new chain at the same time). I wanted something that would really last, so I ordered the Ironman/Regina o-ring combination.
The o-ring chain definitely adds drag. A very small amount, but it was noticeable to me. I went with o-ring because a couple friends said "they are noticeable at first, but once you get going, the rings warm up and there's no loss of power". Wrong! I've noticed it every lap of every ride. The o-ring was a mistake for me. But I spent $70 on it, so I'll use it until it is worn out. Unless someone is interested in buying it from me. Only 3 rides on it so far. Very subtle difference. But I'm a hardcore moto-only kind of guy, so the loss of even a tiny amount of power bugs me.