The Goldtec rings are decent and seem round to me. I've had one on a pair of 75s with a Supertoughness chain and was very happy with its performance. Definitely agree with @umop3pisdn that they feel overbuilt though. They have no hollowing out on the backside like fancier rings (Zen and Rotor) so they are surprisingly heavy.
However, one neat thing to mention is the ring is completely reversible so can be fully used twice. There is a logo etched on both front and back, and each face has machined chanring bolt seats so the bolts sit flush with the surface. There effectively is no "back" to the ring.
The Goldtec rings are decent and seem round to me. I've had one on a pair of 75s with a Supertoughness chain and was very happy with its performance. Definitely agree with @umop3pisdn that they feel overbuilt though. They have no hollowing out on the backside like fancier rings (Zen and Rotor) so they are surprisingly heavy.
However, one neat thing to mention is the ring is completely reversible so can be fully used twice. There is a logo etched on both front and back, and each face has machined chanring bolt seats so the bolts sit flush with the surface. There effectively is no "back" to the ring.