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.

Click to access Biomechanical%20study%20chainrings%20-%20release%202.pdf

Click to access Appropriate%20non-circular%20chainrings.pdf

Click to access 11.pdf