SRAM X Sync Direct Mount Chainring 28T 6mm Offset Model=40 Air Shaft Assembly Color Black Ring Position Type Outer Color Black Ring Position Type Outer Tooth Count 52 Drivetrain Speeds 10 Drivetrain Speeds 11 Chainring BCD 110 Material Aluminum Defined Color Black Synthetic weather resistant micro perforated upper desc li{list style:none Tooth Count 28 Round or Oval Round Drivetrain Speeds 10 Drivetrain Speeds 11 Direct Mount Type Direct Mount SRAM Defined Color Black Ring Position Type Chain Retaining Single Ring Offset 6 Chainring BCD Sram Direct Mount Material Aluminum Chainline Hub Compatibility 135 142 MTB Hubs Chainline Hub Compatibility 150 157 DH Hubs Chainline Hub Compatibility 170 177 Hubs keyword search 1x11