Full Speed Ahead Vero Compact 2x Crankset - 170mm 9-Speed 50/34t 5-Bolt 110 BCD JIS Spindle Interface N11 BLKFull Speed Ahead Vero Compact 2x Crankset 170mm 9 Speed 50 34t 5 Bolt 110 BCD JIS Spindle Interface N11 Black. Full Speed Ahead Vero Compact 2x Cranksets feature aluminum crank arms aluminum outer chainring and inner chromoly inner chainring. Cold forged 6061 T6 aluminum crank arms Stamped ramped and pinned aluminum outer chainring Chromoly steel inner chainring Shimano SRAM 9 speed compatiable Polished anodized black finish with laser graphics