Rotor is stepping up their game with Aldhu. It is a crank component system, allowing you to not only customize 1x, or 2x, chainrings, but also utilize super-light one-piece chainring and spider, both in round and Q formats. Here you’ll find the Aldhu 3D+ Crank Arms. Aldhu is short for Alpe d’Huez, which, when you’re climbing it, begs for light components, to minimize your drag, and stiff components, to maximize your power.