The ROTOR ALDHU 150 mm crank arms are part of ROTOR’s modular ALDHU crankset system, engineered for performance road, gravel, cyclocross, and triathlon use. These arms are built from high-grade aluminum and designed to allow customization of crank setup with different spindle and spider/chainring combinations, including direct-mount and modular options. ALDHU stands for Alpe d’Huez, inspired by ROTOR’s racing heritage, and incorporates OCP Mount technology allowing fine-tuned chainring orientation when paired with Q-RINGS® or standard rings. crank arms only (spindle, spider, and chainrings not included).