I recently installed 1x drivetrain on my Kona Splice, using a RaceRace 32T crank/chain ring(wide/narrow teeth) and Shimano XT rd/cassette/shifter. I've ridden the setup over 150 miles and have not had a single chain drop. Not one. The combination of the wide/narrow chainring, and the Shimano XT rd that really tensions the chain make for a smooth and almost silent drivetrain even over rough terrain. Worth every penny, best upgrade I've ever done to any bicycle.