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 It also prevents a broken spoke from puncturing the tubeless system and losing air }td{text align: left Bead Socket Technology (BST) is a patented rim shape that creates an advanced airtight system for tubeless bicycle rims and tires making an easier to use safer and more secure interface between the rim and tire