Rotor Chainring ALDHU 3D+ / VEGAST, 4-arm, Q-rings, 110 mm BCD

Even more customisation: the ALDHU 3D+ Chainrings by Rotor

With the ALDHU 3D+ and the VEGAST, Rotor has developed a trend-setting road bike crank system that can be freely configured and assembled without special tools and expertise.
The chainrings are mounted on the Spider and are mounted with this via Direct Mount without tools on the axle. To change the chainrings you only need a 10mm hex tool to mount/dismount the drive side crank arm.
Whether it's with round chainrings or the oval Q-rings from Rotor, everything is possible. For the first time, the direct mount system facilitates the fine adjustment of oval chainrings in 1-degree increments, which helps to create unique customisation options tailored to individual requirements.

Specifications:

Application:

Road

Mount:

110 mm pitch circle, 4-arm asymmetrical

Teeth:

34 t, 36 t, 39 t, 42 t, 44 t, 50 t, 52 t, 53 t, 54 t, 55 t, 56 t

Gearing:

2x10-speed, 2x11-speed

Type:

Oval 12.5 %

Technical Information:

Material:

aluminium (7075)

Compatibility:

• ALDHU 3D+
• VEGAST
• Shimano 4-arm cranks (crank covers recommended for Dura Ace R9100, Dura Ace 9000 or Ultegra R8000, Ultegra 6800)

Features:

• OCP (Optimum Chainring Position) Mount Technology: The orientation of the oval chainrings can be finely adjusted through five mounting positions of the crank on the axle; numerous mounting options for spidering or chainrings
• easy chainring exchange with allen wrench
• 34 to 44 teeth for the inner chainring, 50 to 56 teeth for the outer chainring

Technology:

Oval Chainrings
Bio-mechanical studies show that Q-Rings provide better performance than conventional chainrings. The effect is achieved by making the largest muscle groups in the legs more effective and eliminating the dead centre when pedalling. This results in a much smoother and rounder ride overall, with less muscle fatigue. The biggest advantages of using Q-Rings are the significant improvement in general fitness due to improved pedalling, greater sprinting ability due to the elimination of dead centre, slower muscle fatigue, and ultimately an increase in cardiovascular endurance for athletes.
A submaximal test followed by a time trial over a distance of 1 km proved that the Q-rings reduce heart rate and oxygen consumption while improving performance by 1.6 seconds compared to round chainrings.

OCP Mount
The exclusive Rotor technology OCP Mount stands for biomechanical optimisation of the pedal stroke when using Q-Rings. OCP Mount allows you to adjust the alignment of the chainring on the crank in 1 degree increments. The shape of the axle allows independent positioning of the crank arms and Spider or Direct Mount chainring, changing the relative position so that the optimum setting can be found for the user.
The multiple positioning possibilities of OCP Mount allow a super fine adjustment of the OCP (Optimum Chainring Position). This makes it possible to prevent or eliminate knee problems, to optimise the effectiveness of the crank rotation or to improve the traction on the MTB and cyclocross.
Position your chainrings with Rotor's OCP Mount System to get the most out of your ride.

Manufacturer Numbers:

34 tooth:

C01-038-27010-0

36 tooth:

C01-038-25010-0

39 tooth:

C01-038-22010-0

42 tooth:

C01-038-19010-0

44 tooth:

C01-038-17010-0

50 tooth:

C01-038-11010-0

52 tooth:

C01-038-09010-0

53 tooth:

C01-038-08010-0

54 tooth:

C01-038-07020-0

55 tooth:

C01-038-06010-0

56 tooth:

C01-038-05010-0

Contents:

• 1 x Rotor Q-ring chainring
• not incl. Spider