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RotorAldhu 3D+ Crank Arms


Item # RTR0032

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  • Black, 165mm ($320.00)
  • Black, 172.5mm ($320.00)
  • Black, 175mm ($320.00)
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Item # RTR0032

Aldhu 3D+ Crank Arms

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)

Tech Specs
Arm MaterialCNC-machined 7055 aluminum alloy
Arm Length170, 172.5, 175 mm
Bolt Circle Diameter110mm (on Aldhu 3D+ Spider)
Boltsdirect-mount to Aldhu 3D+ Spider (requires 4 bolts for chainring connection) or DM Chainrings (both Round and Oval available)
BB TypeBB30, BB386, BB86, PF30, PF4130, PF4630
SpindleAldhu 3D+ Spindle required (not included)
Q Factor147 mm
Chainline43.5 mm
Compatible ComponentsRotor Aldhu 3D+ Spider, Aldhu 3D+ Spindle, DM Chainrings (both Round and Oval)
Recommended Usecycling
Manufacturer Warrantylimited 2 year

Actual Weight

Black, 165mm
Black, 172.5mm
Black, 175mm

Actual weights are measured in-house by the Competitive Cyclist team.

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