ANY RACE FACE CINCH SYSTEM CRANKSET. WOLF TOOTH'S PATENTED DROP-STOP ® WIDE/NARROW TOOTH PROFILE FOR THE ULTIMATE CHAIN RETENTION AND MUD SHEDDING ABILITY BOTH STANDARD (142MM REAR HUB SPACING) AND BOOST (148MM HUB SPACING) OFFSETS AVAILABLE. FOR 1X9, 1X10, 1X11 AND 1X12 DRIVETRAINS (INCLUDING SRAM EAGLE) COMPATIBLE WITH ALL 10, 11, AND 12-SPEED CHAINS EXCEPT SHIMANO 12-SPEED CHAINS. IF USING A 9-SPEED DRIVETRAIN USE A 10-SPEED CHAIN (SHIFTS AND WORKS WELL ON A 9-SPEED DRIVETRAIN AND FITS THE RING TIGHTER FOR BETTER CHAIN RETENTION). CHAINLINE: STANDARD OFFSET 49MM FOR 26-34T, 51MM FOR 36T (ADDITIONAL CHAINSTAY CLEARANCE) CHAINLINE: BOOST OFFSET 52MM