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Compatibility These rings fit any 104 BCD crankset Wolf Tooth’s patented Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability For 1x9, 1x10, 1x11 and 1x12 drivetrains (including SRAM Eagle) 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). Quarq power meter compatible with sizes 34t and 36t. Filing required for 32t fitment onto some older Quarq Power meters. No modifications are required for the DUB Quarq Power meter. Threaded to use M8 chainring bolts (no nuts required) Ovality of 10% and timing of 112° after TDC (top dead center) Maximum diameter is that of a chainring 2t bigger than the size you order (so be sure there is adequate chainstay clearance.) Available in two different tooth profiles for optimal performance based on your chain type. Use Drop-Stop ST for use with Shimano 12-speed Hyperglide+ chains. Use Drop-Stop A for all 9, 10, and 11spd chains or 12spd SRAM Eagle, KMC, Connex or Wippermann chains.