ALDHU 3D+ Spider Mount Crankset Builder | High end bike components

ALDHU 3D+ Spider Mount Crankset Builder

  • Sale
  • Regular price $365.00

  • Weight: 344g (170) | 637g (170, R50/34t)
  • Axle Diameter: 30mm
  • Chainring Type: 110x4
  • Q-Factor: 147.5mm

Product Description


The Spider Mount ALDHU crankset provides more options than ever. The Aero MAS spider + Aero chainrings serve a functional purpose as well as aesthetic when paired with our Aero specific 54t (for 42) and larger. The Aero setup performs better in the wind tunnel, and the added stiffness is an extra bonus for riders chasing those extra watts. The standard spider (second image) is the option of choice for climbers and classics. All 1x rings are aero, and the offset is set to center the chainline with our standard 110x4 or Aero MAS spider. Both spiders use the 110x4 bolt pattern for compatibility with 1x or 2x groupsets. 

Take control of your crankset with total modularity at a minimum weight with ROTOR's new ALDHU cranks. These streamlined cranks combine an innovative modular structure with top-tier 7075-aeronautic grade aluminum, allowing you to adjust your axles and chainrings to individually customize your ride based on your needs, and your bike's standards. 


It begins with the 3D+ CNC machining to ensure unmatched rigidity from spindle to chainrings so you can take control on the roughest roads. The ALDHU is available with two different 30-millimeter spindle options that offer stiff power, and room for rim brakes or disc brakes. A wealth of crank-arm lengths allow you to optimize your power, while OCP Mount technology lets you further fine-tune your ride with Q rings. The ALDHU’s proprietary, patent-pending design is based on the modularity of each crankset component.

Optimum Chainring Position (OCP) Mount technology allows the rider to fine-tune the orientation of ROTOR’s oval Q Rings by shifting them one degree at a time, finding the right balance in each pedal stroke for smooth power. This enables the rider to utilize the most powerful part of their pedal stroke to propel them further and allow a touch of relief through the weakest points. 

The ALDHU's name comes directly from our racing heritage. It is an abbreviation of Alpe d’Huez to commemorate ROTOR’s first iconic victory at the Tour de France with Carlos Sastre.


When to use the Offset Axle: The Offset axle is recommended for use with Shimano GRX drivetrains, particularly GRX front derailleurs. Other than in the case of GRX drivetrains (which have a chainline slightly outboard of most other groups) the Offset axle is typically reserved for disc-brake drop-bar bikes with tire clearance over 50c. 

Aero options only in a 54t outer or greater tooth count.

Note: Price is for ALDHU crank arms only, and a full crankset will require an Axle  and Chainrings. Standard ALDHU is not compatible with 24mm ALDHU Axles.

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