Yes, all of their examples are single speed but I can't find anything in the article or site that specifically says that. Moreover, in their competitive critiqu

Yes, all of their examples are single speed but I can't find anything in the article or site that specifically says that. Moreover, in their competitive critique of belt drives they complain that belt drives can’t be used with derailleur gears. https://www.newmotionlabs.com/articles/blog-post-title-three-nccsm https://www.newmotionlabs.com/articles/blog-post-title-three... Still, single speed. Get on the podium with track racers. BTW, my skepticism is very tempered. I still think Biopace was a good idea and could be made to work. I think this is a good idea and I still think it could work. But it has to, you know, work. It has to demonstrate and provide that efficiency rather than just claim it because modern chains are pretty darned good.