ROTOR Crank Spindle ALDHU 24 mm for Road Bike

 The name is an abbreviation for the legendary Tour de France climb from Alpe d'Huez, on which Carlos Sastre laid the foundation for the overall Tour victory in 2008 with Rotor Q-Rings and thus gave ROTOR one of the greatest victories in the company's history.

The ALDHU crank system has a modular structure for the greatest possible adaptability. A 110 millimeter 4-hole spider, a 1-fold direct mount chainring or ROTOR's new direct mount chainring combinations can optionally be mounted. For the optimal setting of the oval ROTOR Q-Rings chainrings, the OCP system (Optimum Chainring Position) has been further refined. Using a combination of different positions of the crank arms on the crankshaft and a fine-grained spider mount, the position of the chainrings can be adjusted in 1-degree steps.

The crank arms made of ultra-light aluminum 7055 are manufactured with Rotor's proven Trinity Drilling System. Along the entire length of the crank arm, material is removed from the central, neutral fiber of the crank arm in 3 channels. This material only contributes to a small extent to the load-bearing capacity of a component and can be omitted without negative consequences. The necessary rigidity and stability is achieved with a lightweight construction over large outer diameters.
The ALDHU crank system with a 24 millimeter axle is suitable for bottom brackets with Shimano Hollowtech 2 standard (BSA and PressFit).