evo.com | SRAM Crank Sets > The SRAM Apex 1x DUB Crankset is a wide chainline crankset designed to fit the biggest gravel tires. With a aluminum crank arms and a light, stiff direct mount chainring, there's almost no more efficient way to turn your rear wheel without a motor. This model is compatible with BOOST hub spacing. DUB Technology The relationship between bottom bracket spindle and bearing is the core of DUB technology. It's where stiffness meets durability. SRAM took it a step beyond conventional thinking and made everything simpler-better integrating the relationship between chainring, crank, spindle and bottom bracket. It's this approach to developing a complete system that equals better drivetrain performance. Bolt Circle Diameter (BCD) Direct Mount (DM) BOOST BOOST specification opens up the opportunity for improved frame geometry with shorter chainstays, wider and stiffer suspension pivots, a wider range of chainring options, and bigger, wider tires. Aluminum Crank Arms and Chainring 12 Speed SRAM Drivetrains | SRAM Apex 1x DUB Crankset 2023 - 175mm, 40t in Black Size 175mm 40T | Aluminum