Argon 18 Grey Matter Apex AXS XPLR Gravel Bike
Prepare for any adventure with the Grey Matter Gravel Bike. This alloy-framed gravel bike carries forward the gravel-specific handling and features that established the Dark Matter as the ultimate gravel machine.
3D System
The 3D System delivers the perfect fit without sacrificing safety, steerer stiffness, or aesthetics. By extending the headtube, it provides a wider range of positioning options, catering to the handlebar stack height preferences of all riders. Offering up to three head tube extension heights per frame size, it avoids the stiffness reduction commonly seen with traditional spacers, maintaining precise handling in every position. The sleek design, complete with custom 3D caps for each extension height, highlights exceptional attention to detail and sophisticated styling.
Gravel Geometry
Drawing inspiration from endurance geometry and high-performance road racing designs, this concept focuses on handling, responsiveness, and race-ready positioning, perfectly tailored to the unique demands of gravel riders.
Argon Fit System
Optimised to enhance performance and positioning across all sizes, the geometry is carefully adjusted for each frame size, ensuring a perfect fit for every rider.
Technical Specification
| Frame | Grey Matter |
| Fork | Grey Matter specific |
| Headset | FSA No.69 SRS + 3D |
| Integrated Cables | Yes |
| Wheels | Team Aero-Gravel i23 TC AGX 700c |
| Tires | Vittoria Terreno Dry 700x38c |
| Tyre Clearance | 42c |
| Bottom Bracket | SRAM DUB PF 86.5 Road Wide |
| Front Derailleur | N/A |
| Rear Derailleur | SRAM Apex AXS XPLR |
| Crankset | SRAM APEX AXS 1 DUB 42 |
| Chain | SRAM APEX AXS |
| Cassette | SRAM XG 1231 11-44 |
| Brakes | SRAM APEX AXS Shifter/Caliper Set |
| Rotors | SRAM G2 CleanSweep / F |
| Shifters | SRAM APEX AXS Shifter/Caliper Set |
| Handlebar | FSA NS Adventure Compact HR-RD-310S |
| Stem | FSA OS-167 Omega Pro |
| Bar Tape | Prologo Plaintouch black |
| Saddle | Prologo Akero |
| Seatpost | FSA Gossamer SB20 Seat Post (27.2mm) |
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
Argon 18 Grey Matter Apex AXS XPLR Gravel Bike Sizing
Unable to display Reviews due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
Unable to display Q&A due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.