Super Narrow HG-X 10-speed compatible machined aluminum and steel rings for 4-arm cranks
M985/M980: for 2x precision Dyna-Sys shifting use chainrings in their designated combinations, do not use alternate configurations
M980: 24/32/42t uses thick aluminum outer ring with middle ring that utilizes Ti teeth with carbon-composite reinforcement for great durability and alloy inner chainring
M785: for 2x precision Dyna-Sys shifting use chainrings in their designated combinations, do not use alternate configurations
M780/770-10: thick aluminum outer ring with middle ring that utilizes steel teeth with carbon-composite reinforcement for great durability and alloy inner chainring
M675: for 2x precision Dyna-Sys shifting use chainrings in their designated combinations, do not use alternate configurations , * notes "B-level" compatible
M660-10: aluminum outer ring with middle ring that utilizes steel teeth with carbon-composite reinforcement for great durability and steel inner chainring. Compatible with M590-10 cranksets
32t (SH-22598) chainring with stepped interface came stock on cranksets up until early 2013, the newer B-Type version (SH-22596) replacement chainring includes 4 nuts for the flat profile without the step. Visit bike.shimano.com for any compatibility inquiries
For best shifting performance, use chainrings in their designated combinations (AG-AG, AF-AF, etc)
