Rotor Aldhu Alloy Crank Arms
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This item is "Final Sale" and cannot be returned or exchanged
This item is "Final Sale" and cannot be returned or exchanged
This item is "Final Sale" and cannot be returned or exchanged. Once the order is processed, labeled, or shipped, the order cannot be canceled.
Every item goes through quality control prior to shipping. If there are any imperfections or issues, you will be notified prior to the order being processed.
Items on "Final Sale" are for online only. These items are not at our physical stores for purchase.
Pickup available at RA Cycles - Brooklyn
Usually ready in 24 hours
Questions about this product?
Questions about this product?
Rotor Aldhu Alloy Crank Arms
Rotor Aldhu Alloy Crank Arms Info
The Rotor Aldhu Alloy Crank Arms are built from 7055 aluminium and CNC-machined down to the minimum material needed to keep them stiff and light — Rotor's Trinity drilling hollows out the arms without sacrificing power transfer where it matters. Named after Alpe d'Huez, the Aldhu system was designed with climbing in mind: low weight, high rigidity, and a modular build that gives you real flexibility in how you set up your drivetrain.
These are crank arms only — part of Rotor's component system that separates the arms, spindle, spider, and chainrings into individual purchases. That modularity is the point. The spider mounts onto splines on the bottom bracket spindle, the right arm onto its own spline set, and the whole assembly locks to the axle with a degree-by-degree adjustment range — useful when you're dialling in chainring position, particularly with Rotor's Q-rings. Compatible bottom bracket standards include BB30, BB386, PF30, PF4130, PF4630, and UBB30. Arms are secured with bolts tightened via a 10mm hex wrench.
Rotor Aldhu Alloy Crank Arms Specs at a Glance
- Material: 7055 aluminium, CNC-machined with Trinity drilling
- Available lengths: 150mm, 155mm, 160mm, 165mm, 170mm, 172.5mm, 175mm
- BB compatibility: BB30, BB386, PF30, PF4130, PF4630, UBB30
- Bolt fitting: 10mm hex wrench
- Note: Spindle, spider, chainrings, and bottom bracket sold separately
