The combination of aluminium and technopolymer features offers the best compromise between rigidity and flexibility. It can fit in all types of frames and for all types of bottles. The aluminium cage offers good grip, while the technopolymer in the fixtures absorbs shock. In aluminium and technopolymer: The right combination between rigidity and flexibility. 0% Vibration: Vibration filter to mitigate the shock of rough terrains.Material: Aluminium cage and technopolymer fixtures.Weight: 40g