Stans Flow EX3 Rear Wheel 27.5 12 x 148mm 6 Bolt Micro Spline Black Direct Mount Type Direct Mount SRAM Tooth Count 30 Drivetrain Speeds Tooth Count 30 Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Round or Oval Oval Defined Color Black Direct Mount Type Direct Mount CINCH Ring Position Type Chain Retaining Single Ring Chainring BCD Direct Mount CINCH Offset 3 Chainline Hub Compatibility 141 148 Boost Hubs Material Aluminum Rock solid camera mount position improves video quality by removing camera shake the Flow MK3 and is built to take more abuse Its designed with increased stiffness without compromising its ride quality and ability to absorb impacts