Wolf Tooth Elliptical Direct Mount Chainring 30t SRAM Direct Mount Drop Stop A For SRAM BB30 Short Spindle Cranks 0mm Offset BLK ModelNumber=31888 Color Black Rings 49 Number Color Black Rings 49 Number of Chainrings Single Crank Length (mm) 165 Crank Intended Use Track Drivetrain Speeds Single Speed 1 2" x 1 8" BB Included No Pedal Spindle 9 16" Spindle Interface Type 386 EVO Chainring BCD 144 Chainline Hub Compatibility 120 Hubs Defined Color Black The XTR M9120 caliper features a MONO BODY design which is machined from a single cold forged block to maximize rigidity and four ceramic pistons for perfect Rider Tuned stopping power Color Black Ring Position Type Chain Retaining Single Ring Tooth Count 30 Round or Oval Oval Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Drivetrain Speeds 9 Chainring BCD Sram Direct Mount Offset 0 Chainline Hub Compatibility 135 142 MTB Hubs Material Aluminum Material Aluminum Defined Color Black Direct Mount Type Direct Mount SRAM padding top:35px