ROTOR ALDHU Direct Mount Cranks
|Options||172.5mm Black In Stock
175mm Black - USUALLY AVAILABLE WITHIN 3-10 DAYS
Introducing ALDHU cranks, ROTOR's lightest cranks ever. The innovative modular structure, together with axles and different chainring options, makes each component individually available to accommodate the current spectrum of riders and bike standards.
The ALDHU incorporates Optimum Chainring Position (OCP) Mount technology, which enables the rider to fine-tune the orientation of ROTOR's oval Q-Rrings. The ALDHU proprietary, patent-pending design is based on the modularity of each crankset component.
The new model name comes directly from ROTOR's racing heritage. It's an abbreviation of Alpe d'Huez to commemorate ROTOR's first iconic victory at the Tour de France with Carlos Sastre.
The ALDHU cranks are constructed from CNC 7055 aluminium. 7055 combines the superior physical properties of a 7000 alloy series with incredible fatigue resistance. Every single bar of raw material is checked by ultrasonic inspection to guarantee it free of internal defects.
Computer Numerical Control (CNC) machining provides a precise and consistent manufacturing process. This is especially important when it comes to crafting bike components in order to ensure flawless functionality with respect to all the parts working together. Equipped with the latest CNC resources, ROTOR parts are precisely machined to within a hundredth of a millimetre.
ROTOR's CNC-machined cranks feature Trinity Drilling System (TDS), which is a process that drills three full-depth holes along the axis of the crank. This allows the removal of excess material from the crank arm resulting in a lighter crank without compromising its exceptional stiffness-to-weight ratio.
ROTOR's Twin Leg Concept (TLC) boasts the stiffest possible crankset by balancing the cranks' left-to-right stiffness. There is no point in making an ultra-stiff right crank arm if the left crank arm doesn't measure up. By designing the cranks as a real set - not just two individual arms, TLC offers the most-balanced cranks possible.
ROTOR's exclusive patented technology OCP Mount refers to the pedalling's biomechanical optimisation when you are using Q-Rings or other oval chainrings. The shape of the axle lets you position independently both cranks and spider or Direct Mount, and thereby change the relative orientation. Users of oval chainrings benefit from OCP with micro-adjustment, in 1 degree increments, to increase the performance of pedalling and to reduce strain on the knees.
- Weight: 347.8g (175mm, excluding chainrings and axle)
- Sizes: 170/172.5/175mm
- Q-Factor: 148mm/153mm depending on axle choice, rim or disc
- Chainline: 43.5mm/46mm depending on axle choice, rim or disc
The modular system of ALDHU means you can choose the components individually. Simply choose your:
3) Separate spider and spider mount Q-Rings; or one-piece direct mount chainrings
Axles are available in 24mm and 30mm sizes (see here).
Spiders are available in 110 BCD with 4 arms (see here), and 5 arms for riders with existing 5 bolt Q-rings.
The new 4 bolt spider mount Q-Rings are available in round and oval versions as 53, 52 and 50 outer rings, and 39, 36 and 34 inner rings (see here for the oval outer rings and here for the oval inner rings).
The new one-piece direct mount chainrings are available in round and oval versions as 53/39, 52/36 and 50/34 combinations.
As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying.