Quarq Elsa GXP Exogram hollow carbon fiber crank arms with CNC machined aluminum spider Exogram hollow carbon fiber crank arms with CNC machined aluminum spider Exogram hollow carbon fiber crank arms with CNC machined aluminum spider SRAM TSM rings (same as SRAM Red - Black edition) gives compatibility to all SRAM 10 speed front derailleurs 735g (GXP, 130BCD, 172.5mm)