Full Speed Ahead Gossamer Pro Modular AGX+ 1x Crankset - 172.5mm 11/12-Speed 42t 120mm BCD 386 EVO Spindle Interface BLKFull Speed Ahead Gossamer Pro Modular AGX+ 1x Crankset 172. 5mm 11 12 Speed 42t 120mm BCD 386 EVO Spindle Interface Black. The FSA Gossamer Pro Modular AGX+ is a high end crankset for alloy lovers. The cold forged aluminum arms are heavily scalloped for the maximum strength to weight ratio. Thanks to the adaptable BB386 EVO 30mm spindle this modular system will fit a wide variety of frames with a range of bottom bracket standards. Cold forged alloy