WolfTooth Drop-Stop A Chainring DM Sram Boost Oval

WolfTooth Drop-Stop A Chainring DM Sram Boost Oval



  • 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.

  • There are 3 offsets:

  • Standard: 47mm chainline, 6mm offset for cyclocross and road cranks

  • Standard: 49mm chainline, 6mm offset for GXP and long spindle BB30

  • Boost: 52mm chainline, 3mm offset

  • BB30: 49mm chainline, 0mm offset for BB30 short spindle cranks

  • 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.


  • Design and manufactured in the Minneapolis, MN USA

  • Wolf Tooths patented Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability

  • Recommend the use of a clutch style rear derailleur for the best chain security.

  • Material - 7075-T6 aluminum

  • Colors - black

  • Chainline -

  • 47mm on cyclocross and road with 6mm offset ring

  • 49mm for standard non-boost (135/142mm rear hub spacing) with 6mm or 0mm offset (see compatibility above for which offset you need

  • 52mm for Boost with 3mm offset (148mm rear hub spacing)