Originally Posted by
Aubergine
Seriously? The concept of oval chainrings has been around for decades. Search for Shimano Biopace, for example. Those are relatively mild deviations from circular, and there are many others that are more ovalized.
Or Sugino Synchroid, like in my avatar.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer