RockShox Crown Steerer Uppertube Assembly Pike DJ Solo Air 26" 40mm Offset Aluminium Taper Steerer 0.5mm Thread Pitch B1 Bla ck description top cap interface parts Ring Position Type Chain Retaining Single Ring Position Type Chain Retaining Single Ring Tooth Count 40 Round or Oval Oval Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Offset 6 Chainline Hub Compatibility 135 142 MTB Hubs Chainline Hub Compatibility 141 148 Boost Hubs Chainline Hub Compatibility 150 157 DH Hubs Chainline Hub Compatibility 157 Super Boost Hubs Material Aluminum Defined Color Black Direct Mount Type Direct Mount SRAM }Nitto M18 Front Rack Mount Bicycle Rack: Silver 5mm Thread Pitch B1 Bla ck list style position:outside