Tinkering 101: Shifting big gears with Shimano Dura-Ace 9100/9150 & Ultegra 8000/8050 Derailleurs

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 […]