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The Argon 18 Grey Matter is loaded with all the gravel specific features found on the Dark Matter, but instead utilises an alloy frame. Take your kit with you and head down any muddy singletrack and the highly capable Grey Matter. The geometry draws inspiration from Argon 18 endurance bikes, optimising the handling, responsiveness and placing riders in a race ready position. These alloy Argon 18 gravel models also come loaded with reliable gear componentry from SRAM.
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Important Update for Our US Customers
We regret to inform you that due to ongoing challenges related to current US tariffs, shopping on Sigma Sports is temporarily unavailable for customers based in the United States.
We understand how disappointing this may be and sincerely apologize for any inconvenience caused. Please rest assured that we are actively exploring solutions to resume service and find the best way to support our US community.
We appreciate your patience and understanding during this time, and we look forward to welcoming you back as soon as possible.
If you require any further assistance, please reach out to the customer services team
— The Sigma Sports Team