e*thirteen TRS Race Carbon Crankset - 175mm 73mm 30mm Spindle e-thirteen P3 Connect Interface BLKGen4 cranks have the spindle on the non drive side of the crank for easier chain guide setup and drivetrain maintenance Adjustable chainline accommodates non Boost (142mm), Boost (148mm) and Super Boost (157mm) Now includes an 8mm self extractor, meaning the cranks can be removed with nothing more than an 8mm allen key Carbon fiber trail crank arms and aluminum spindle w Quick Connect lockring and Adaptive Preload Adjuster (APS), compatible with all