Convert Mountain Bike To Drop Bars / Vintage Mountain Bike Drop Bar Conversion
https://bikerumor.com/2020/04/14/chiru-kegeti-gravel-bike-evolves-epic-ready-titanium-hardtail-29er-for-bikepacking-adventure/
https://www.cycleexif.com/olivetti-dropkicker-drop-bar-mtb
https://drandalls.wordpress.com/2017/09/26/dropbar-hardtail-thoughts/
http://thebikeguide.blogspot.com/2008/
hubs _ mountain _ products _ acros sport GmbH.pdf
https://acros-components.com/en/products/mountain/hubs/