[1 / 1 / ?] 109KiB, 588x823, brainlet.jpg View SameGoogleImgOpsiqdbSauceNAO Thread Reply Original Report Media View Same Google ImgOps iqdb SauceNAO Download Shimano Biopace Anonymous Sun 24 Nov 2019 09:43:48 No.1423232 View ViewReplyOriginalReport Quoted By: Is it all hipster hype from Sheldon Brown, or worth keeping?https://www.sheldonbrown.com/biopace.htmlPic is the shape of the chainrings
