Free 2-Day Shipping on Orders Over $50

Detail Images

  • Rotor - Bottom
  • Rotor - Aldhu 3D+ Crank Arms - Black
  • Rotor - Bottom -

Current Color

  • Rotor - Aldhu 3D+ Crank Arms - Black

Rotor Aldhu 3D+ Crank Arms


Free 2-Day shipping on orders over $50. Learn More

Select style & size:

Select options
  • Select options
    • Black, 170mm
    • Black, 172.5mm
    • Black, 175mm

    Be the first to review


    Ultra-light cranks with modular adaptability.

    Not only are the Aldhu 3D+ Crank Arms some of the lightest cranks ever designed by Rotor, but they're also equipped with Optimal Chainring Position (OCP) to suit your pedaling biomechanics with the use of Oval Q Rings. The OCP mount gives riders precise one-degree adjustments with Direct-Mount Q Rings from Rotor, also working with Rotor's Aldhu 3D+ Spider mounted to 110 BCD Q Rings. Ultimately, OCP adaptability sets the Aldhu 3+ crank system apart from others on the market by tailoring the Q Ring position to suit your individual pedal stroke for increased efficiency.

    This modular crankset requires the separate purchase of Rotor's Aldhu 3D+ Spindle (30mm), as well as an Aldhu 3D+ Spider with a compatible 110 BCD Ring. You can also choose to purchase the spider and chainring attached as one if you prefer a seamless direct-mount option. And because it's designed with customization in mind, Rotor offers oval and round options in both crankset configurations to suit your particular needs.

    Rotor employs CNC-machined 7055 aluminum alloy with Trinity drilling technology to produce incredibly lightweight, ultra-stiff crank arms worthy of discerning cyclists and the pros alike. In fact, the Aldhu 3D+ name is derived from a legendary climbing stage in the French Alps that earned Rotor a 2008 victory on the world's most iconic race.

    • Modular crank arms are incredibly light and stiff
    • Rotor's lightest crankset of CNC-machined 7055 alloy
    • Optimal Chainring Position with one-degree adjustments
    • Direct-Mount with Aldhu 3D+ Spindle (30mm), 110 BCD Spider
    • 110 BCD Round and Oval Q Ring options with Aldu 3D+ Spider
    • Seamless integration with Rotor Direct-Mount Rings (oval and round)
    • Item #RTR0032

    Tech Specs

    Arm Material
    CNC-machined 7055 aluminum alloy
    Arm Length
    170, 172.5, 175 mm
    Bolt Circle Diameter
    110mm (on Aldhu 3D+ Spider)
    direct-mount to Aldhu 3D+ Spider (requires 4 bolts for chainring connection) or DM Chainrings (both Round and Oval available)
    BB Type
    BB30, BB386, BB86, PF30, PF4130, PF4630
    Aldhu 3D+ Spindle required (not included)
    Q Factor
    147 mm
    43.5 mm
    Compatible Components
    Rotor Aldhu 3D+ Spider, Aldhu 3D+ Spindle, DM Chainrings (both Round and Oval)
    Recommended Use
    Manufacturer Warranty
    limited 2 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?