Wolf Tooth 104 BCD Chainring 30t 104 BCD 4 Bolt Drop Stop B Black CheckoutTitle=SRAM 42 Tooth 107mm BCD x 4 Bolt 1x12 Speed X Sync Chainring Multi Shifting System allows the rider Multi Shifting System allows the rider to shift up or down by 11 sprockets in a single action Brake Lever Actuation Hydraulic Rotor Included No Color Black Brake Caliper Mount Flat Mount Hydraulic Fluid Type Mineral Oil Brake Lever Use Right Rear Der Shifter Compatibility Campy Centaur Potenza Chorus Record Super Record 2015+ Includes Brake Disc Adjustable Reach Yes Drivetrain Speeds 12 Defined Color Black Color Black Ring Position Type Chain Retaining Single Ring Tooth Count 30 Round or Oval Round Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 104 Material Aluminum Defined Color Black keyword search SRAM T Type keyword search SRAM Transmission Made from 7075 T6 aluminum for long life