Absoluteblack chainrings are not Biopace

Cycling expert Justin Loretz will explain why Absoluteblack oval chainrings are very different from Shimano Biopace invention and how they work. Biopace was invented by Shimano in early 1980's with aim to improve cycling efficiency. While goal was great the execution was a big mistake. Absoluteblack Ovals aims at the same goal and actually deliver it with fully working product. Learn why they are so different to Biopace chainrings.