Muc Off Ultrasonic Optimization Bundle MFPN=TB96800700 Features a 360 degree backside Features a 360 degree backside plate support structure to ensure chain pins are pressed perfectly every time Color Black Ring Position Type Chain Retaining Single Ring Tooth Count 28 Round or Oval Round Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD Sram Direct Mount Offset 3 Chainline Hub Compatibility 141 148 Boost Hubs Material Aluminum Defined Color Black keyword search SRAM T Type keyword search SRAM Transmission Direct Mount Type Direct Mount SRAM top li{margin left:5% }Muc Off Ultrasonic Optimization Bundle