EASTON CINCH CRANKSETS INCLUDING EC90SL WORKS WITH SRAM FLATTOP CHAIN WOLF TOOTH'S PATENTED DROP-STOP ® WIDE/NARROW TOOTH PROFILE FOR THE ULTIMATE CHAIN RETENTION AND MUD SHEDDING ABILITY 10, 11, & 12SPD EAGLE AND FLATTOP - THESE CHAINRINGS ARE DESIGNED TO WORK WITH ALL 10-SPEED AND 11-SPEED CHAINS. THEY ALSO WORK WITH 12 SPEED SRAM FLATTOP, SRAM EAGLE AND KMC CHAIN. THEY DO NOT WORK WITH SHIMANO 12 SPEED HYPERGLIDE+ CHAIN. SHIMANO 12-SPEED CHAINS REQUIRE THE USE OF OUR SHIMANO 12-SPEED SPECIFIC CHAINRINGS IF USING A 9-SPEED DRIVETRAIN USE A 10-SPEED CHAIN. IT FITS TIGHTER FOR BETTER CHAIN RETENTION