Not ready for carbon? The Gossamer Pro Modular AGX+ 1X 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 BB standards, 40T, 42T and 44T are the offered ring combinations. Cold forged alloy spider CNC machined alloy spindle Chromoly chainring bolts Lenght - 165mm, 170mm, 172.5mm, 175mm Q-Factor - 154mm Chainline - 50mm BCD - 120mm Chainrings - 40T, 42T, 44T WEIGHT: 754grams (44T)