This Oversized derailleur cage is reducing frictions on 2 parts: -The shape of the pulley enables a lower angle of pins of the chain. lower angle = less energy required from the pins to move each other -The hybrid ceramic bearings are reducing frictions: the difference is spectacular with standard Shimano/Sram steel bearings
Rotor Aldhu carbon with spidering is the lightest crank ever made by Rotor. -Lightest carbon fiber arms -light axle (30mm, aluminum) -light chainrings and spider: cnc machined in one piece of aluminum.
Rotor Aldhu carbon is the lightest crank manufactured by the brand in the history. If you already purchased Aldhu 30mm arms (aluminum) you can upgrade your crank arms with this carbon fiber version. You'll save 95g over aluminum arms and 125g over Vegast aluminum arms.