Rotor Oval Chainring 39T for ALDHU/Shimano black

With the ROTOR ALDHU 3D+, ROTOR has developed a trend-setting racing bike crank system that can be freely configured and assembled without special tools and expertise. Thanks to the Direct Mount System, changing blades is a matter of minutes when using the combination chainring in one-piece design or single blades with Direct Mount Spider. An Allen key is all that is needed. Whether with round chainrings or the oval Q-rings from Rotor, everything is possible and available in many variants. The Direct Mount System of the Aldhu 3D+ allows for the first time the fine adjustment of oval chainrings in 1-degree increments and thus an incomparable individualisation to personal requirements.

When configuring the Aldhu 3D+, several chainring combinations, milled from one block (One-Piece Design), are available and push the system weight below the magical 600 gram mark. Alternatively, the crank can be configured with a lightweight Direct Mount Spider and two single chainrings.

The chainrings are mounted on the ALDU 3D+ spider and are mounted on the axle using the direct mount method without tools. To change the chainrings only a 10mm hexagon socket wrench is needed to mount / dismount the crank arm on the drive side. The ovality of the chainrings is 12.5%.

The chainrings can also be mounted on Shimano© 4 arm cranks in the OCP3 position, which is used by most riders. For optical reasons we recommend the appropriate ROTOR covers for use on Shimano.