ROTOR 公路 Spidering 一體式 圓齒環 DM - 黑色 -適用于 ALDHU 3D+

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.