Shimano's latest 11-speed Dura-Ace 9100 mechanical / 9150 Di2 rear derailleurs and their Ultegra cousins, the 8000 mechanical and 8050 Di2 - in the regular / short cage variant, are listed by Shimano as having a maximum rear cog capacity of 30 teeth. The mid-cage of the latest Ultegra derailleur, mechanical or Di2, is designed to work nicely with the company's newest cassette addition, the 11-34 ratio. But like a lot of manufacturers, Shimano is playing it safe. JOM of the Gravel Cyclist crew figured the short / regular cage versions of these derailleurs are capable of much more, so he produced a video about it. Can you shift to a 36 tooth cog using Shimano's latest lineup of 11-speed Dura-Ace / Ultegra short / regular cage rear derailleurs? As an FYI, the Ultegra versions of these derailleurs will be all over gravel bikes from 2018 onwards. Thank you to Rotor America (http:/rotorbike.com) for supplying the 3d+ crankset and bottom bracket as seen in this video. Please subscribe to the channel and spread the word about Gravel Cyclist on YouTube. Thank you! Web: http://GravelCyclist.com Facebook: http://facebook.com/GravelCyclist Instagram - http://Instagram/GravelCyclist Twitter - http://twitter.com/GravelCyclist Vimeo - http://vimeo.com/GravelCyclist