ROTOR crank arms ALDHU for 24 mm axle | Racing bike
With the ALDHU, ROTOR is bringing the lightest crank in the company's history to the market. 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).
NOTE: Contrary to the illustration, only the crank arms are supplied. You can find suitable chainrings and crank axles in our shop.
Technical specifications:
intended use : racing bike, cyclocross, triathlon
Material crank arms: aluminum 7055
Crank lengths: 170, 172.5 or 175.0 mm
Compatibility chainrings: Rotor ALDHU
Compatibility axle : rotor ALDHU 24 mm
Chainring gradation: 1-fold or 2-fold
Chainring mounting: Direct Mount (1-way or rotor ALDHU 2-way spider rings) or rotor ALDHU 110 mm 4-arm spider (Shimano asymmetrical)
Q factor: 148 mm
chain line : 43.5 mm
Compatibility bottom bracket: Shimano Hollowtech 2 Standard (BSA and PressFit)
Color: Black
Weight according to the manufacturer: 355g (170 mm)
Weight weighed: 358g (172.5mm)
Scope of delivery: crank arms (left, right)