Non-circular chainrings

I’ve been playing around with my road bike gearing and recently snagged a set of biopace 38/48 chainrings. I’m going to drop some links here to read later.

http://www.noncircularchainring.be/pdf/Biomechanical%20study%20chainrings%20-%20release%202.pdf

http://www.noncircularchainring.be/pdf/Appropriate%20non-circular%20chainrings.pdf

http://www.scielo.br/pdf/rbcdh/v14n4/11.pdf

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