Gravel Dark Matter Shimano GRX RX810 Model year: 2019 Model year: 2019 Road / Gravel Suspension: Rigid Wheel size: 700c Add Argon 18 Dark Matter Shimano GRX RX810 to comparison Remove Argon 18 Dark Matter Shimano GRX RX810 from comparison Comparison full (3 of 3): remove a bicycle to add Argon 18 Dark Matter Shimano GRX RX810