Introducing the new Round Direct Mount Chainrings. The Direct Mount is CNC’d from a block of 7075 aluminum to save more than 30 g over a standard chainring combo which, together with ALDHU crank arms, becomes ROTOR’s lightest crankset ever. The ALDHU 3D+'s innovative modular structure makes each component individually available to accommodate the current spectrum of riders and bike standards.

Can be mounted without special tools and expertise

Directed Mount Double Chain Ring

The direct mount system of the Aldhu 3D+ allows for the first time fine adjustment of oval chainrings

The chain rings in one piece design are made from one piece and are mounted on the axle in the direct mount process without tools