ROTOR crank arms ALDHU 3D + for road bike
With the ALDHU 3D +, ROTOR brings the lightest crank in its history to the market. The name is an abbreviation for the legendary Tour de France rise of Alpe d'Huez, where Carlos Sastre laid the cornerstone for the Tour overall victory in 2008 with Rotor Q-Rings and thus gave ROTOR one of the biggest victories in the company's history.
For the greatest possible adaptability, the ALDHU crank system has a modular design. Thus, the chain line for disc and rim brake hubs can be adjusted via 2 different shafts and the 110 mm 4-hole Spider can be exchanged for ROTOR's new Direct Mount chainring combinations or for a 1-way Direct-Mount chainring. For optimum adjustment of the oval ROTOR Q-Rings chainrings, the OCP system (Optimum Chainring Position) has been further refined. Through a combination of different positions of the crank arms on the crankshaft and a fine-styled Spider recording the position of the chainrings can be adjusted in 1-degree increments.
The crank arms made from ultralight 7055 aluminum are manufactured using Rotor's proven Trinity Drilling System. Over the entire length of the crank arm material is removed from the central, neutral fiber of the crank arms in 3 channels. This material contributes only slightly to the load capacity of a component and can be omitted without negative consequences. The necessary rigidity and stability is achieved with lightweight construction over large outer diameter.
The matching ALDHU crank axles with 30 mm outer diameter can be driven with corresponding inner bearings in frames with PF30, BSA, BBright (Cervélo) and BB30 bottom bracket shell.
NOTE: Contrary to the illustration, only the crank arms are supplied. Matching chainrings and crank axles can be found in our shop.
intended use : road bike, cyclocross, triathlon
Material crank arms: aluminum 7055
Crank lengths: 150, 155, 160, 165, 170, 172.5 or 175.0 mm
Compatibility chainrings: Rotor ALDHU
Chainring gradation: 2-fold
Chainring Assembly: Direct Mount (1-speed or 2-Spiderring ALDHU Spiderring) or Rotor ALDHU 110-mm 4-Spider Spider (Shimano Asymmetric)
Q-factor: 148 mm (rim brake) or 153 mm (disc brake)
chain line : 43.5 mm (rim brake) or 46 mm (disc brake)
Compatibility Bottom Bracket: BSA, ITA, BB86, BB30, BB30A, PF30, BBRight, BB386 Evo (optional, not included)
Weight: 356g (172.5mm, crank arms only)
Scope of delivery: 1x rotor ALDHU crank arms (left, right)