Product: Wolf Tooth Components Elliptical Direct Mount Chainrings for SRAM Cranks (30t, Drop-Stop A)
Brand: Wolf Tooth Components
Color: Black
Compatibility  These direct mount chainrings will replace your existing chainring and spider, which is attached via 3 bolts on the back side of the spider near the spindle. You will use these same 3 bolts to attach the Wolf Tooth SDM chainring. Note that the SRAM 12spd Red and Force AXS use a different 8 bolt mounting interface that is not compatible with these chainrings. Also compatible with Cane Creek eeWing cranksets. There are 3 offsets:  Standard Road/CX/Gravel: 6mm offset for cyclocross and road crank applications with 47mm chainline Standard MTB: 6mm offset for non-Boost mountain bikes, GXP and long spindle BB30 cranks for 49mm chainline Boost: 3mm offset for 52mm chainline BB30: 0mm offset for BB30 short spindle cranks for 49mm chainline  Fat Bikes: If you are planning to use this on an X9 or XX1 fat bike crankset with a 190/197 rear hub spacing use the 0 offset ring. If your fat bike has a 170/177 rear hub spacing, use the Standard 6mm offset Praxis Works Road/CX cranks use the 6mm offset. Praxis Works mountain cranks use the 3mm offset for their DM-A and 0mm offset for their DM-B chainrings. If you have a BB30 crankset (30mm diameter aluminum spindle) the measurement pictured below will help you determine whether it is a long or short spindle. 
Mount type: Direct Mount for Sram
Teeth: 30
Offset: Boost
Chain Compatibility: Drop-Stop A tooth profile for all 9, 10, and 11spd chains or 12spd SRAM Eagle, KMC, Connex or Wippermann chains
Material 7075-T6 aluminum, Made in USA by Wolf Tooth Components

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