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@gbj_tester
Considering they are the same price as DuraAce, they are shit. Look at the edge where your chain roller is going to sit. You can clearly see horrible defects where the metal has been sheared by the stamping tool, and also that the stamping dies don't line up properly, causing a ridge to form at the midline plane of the sprocket. That's the kind of quality you'd accept on a Create, but if you're building a nice bike, get a nice sprocket.