A re flat pedals better if the platform is convex? Concave? Why not both? While the internet argues about which pedal design ...

In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.

OneUp’s new flat pedal has a unique wavy profile that the company says promotes an ‘aggressive heels-dropped position and ...

A lens is a specially shaped pieces of glass or transparent plastic, that is used to focus light. A convex lens is made from a transparent material that bulges outwards in the middle on both sides.