velomaniac":17ijup9n said:Lots of modern designs based on years of research and development other than full sus dont use estay design which suggests good reasons for their demise.
You might be surprised how much research and development in the bike world seems to rediscover things rather than make real progression. New materials, of course, can offer the chance to revisit things which were previously thought to be too heavy or otherwise impractical. This early design for bicycle suspension looks rather familiar for example:
http://bicyclepatents.com/early-front-b ... nsion/119/
and full suspension from 1891 - with something like a e-stay design:
http://patentpending.blogs.com/patent_p ... ont_s.html
I fully expect e-stay designs to make at least one come back (and go out of fashion again) within my lifetime. Ditto biopace chain rings.