FSAGossamerPro2x Cset 46/36T 175mm ABS N11 – Black. The FSA Gossamer Pro 386EVO is a high-end crankset for alloy lovers. The cold-forged aluminum arms are heavily scalloped for the maximum strength to weight ratio and the versatile 30mm BB368EVO spindle is forged from an AL7050 material. The Gossamer fits many combinations of bikes riders and riding styles.