Originally Posted by
Canker
Anybody tried out a 11 speed shimano mtb cassette on a roadie setup yet? If so what rear derailleur would you go with to get the pull ratios right? That would certainly get you some climbing gears.
Have a look here for some answers
Shimano XTR M9000 11-speed Component Compatibility FAQs - Useful for Cyclocross? Gravel? - Cyclocross Magazine - Cyclocross News, Races, Bikes, Photos, Videos would go with what
#cale said, walking would probably be better