Argon 18 Dark Matter
373A.3E.1
This bike is available through the Cycle to Work Scheme
Unsure of your size?
Book a sizing appointment in our bike fit studio and get the right fit.
From rough race days to rides into the unknown, the Dark Matter is Argon 18's carbon gravel machine. Massive tyre clearance, smart storage and rugged geometry let it power through whatever the ride throws at you.
Gravel geometry draws on Argon 18's endurance platform, so handling stays responsive and race-ready. The Topological Compliance System adds vertical compliance to take the sting out of rough surfaces without losing stiffness.
Highlights
- Up to 57mm tyre clearance
- Integrated downtube storage
- 1x-specific design, 2x compatible
- Compatible with gravel suspension forks
- Mounts for bags and mudguards, plus internal dynamo routing
- SRAM Force XPLR, SRAM Rival XPLR and Shimano GRX builds
Sizes and fit
Available in XXS (44-46cm), XS (47-50cm), S (51-53cm), M (54-56cm), L (57-59cm) and XL (60-62cm). Each size has its own geometry under the Argon Fit System.
Colours
Cactus Green, Root Beer and Anthracite.
- Questions on size or spec? Call 01625 403803 or visit us at 48a London Road, Alderley Edge
- Sized properly: book a bike fit in our Alderley Edge studio
- Not in the shop? Supplier stock reaches us in 4–5 days, then we post it or it's ready to collect
- 30-day returns (custom builds excluded)
- ★★★★★ 150+ five-star Google reviews
Frameset
- Frame: Dark Matter carbon
- Fork: Dark Matter carbon
- Included: Storage Optimisation System
Wheels and tyres
- Tyre clearance: 57mm
Cockpit and contact points
- Handlebar: FSA A-Wing Pro AGX
- Stem: FSA SMR-II
- Bar tape: Ciclovation Grind Touch
- Saddle: Repente Quasar S 2.0
- Seatpost: Argon 18 TDS-C
SRAM Force XPLR AXS build
- Wheels: Zipp 303 XPLR S
- Tyres: Schwalbe G-One RX Pro TLR 700x50c
- Bottom bracket: SRAM DUB T47 Wide
- Rear derailleur: SRAM Force XPLR AXS E1
- Crankset: SRAM Force XPLR 40T
- Chain: SRAM Force E1
- Cassette: SRAM Force XPLR XG-1371 10-46T
- Shifters: SRAM Force AXS E1
- Brakes: SRAM Force AXS E1 hydraulic disc
- Rotors: SRAM Centerline XR Centerlock, 160mm front and rear
SRAM Rival XPLR AXS build
- Wheels: DT Swiss G1800 XDR
- Tyres: Schwalbe G-One RX Pro TLR 700x50c
- Bottom bracket: SRAM DUB T47 Wide
- Rear derailleur: SRAM Rival XPLR AXS E1
- Crankset: SRAM Rival XPLR 40T
- Chain: SRAM Rival E1
- Cassette: SRAM Rival XPLR XG-1351 10-46T
- Shifters: SRAM Rival AXS E1
- Brakes: SRAM Rival AXS E1 hydraulic disc
- Rotors: SRAM Paceline Centerlock, 160mm front and rear
Shimano GRX RX610/822 build
- Wheels: DT Swiss G1800 Microspline
- Tyres: Vittoria Terreno T50 Mixed 700x50c
- Bottom bracket: Token T47 24mm
- Rear derailleur: Shimano GRX RX822, 51T max
- Crankset: Shimano GRX RX610-1 40T
- Chain: Shimano CN-M7100 12-speed
- Cassette: Shimano SLX CS-M7100 10-51T
- Shifters: Shimano GRX RX610
- Brakes: Shimano GRX RX400 hydraulic disc
- Rotors: Shimano SM-RT70, 160mm front and rear
| Size | XXS (44-46) | XS (47-50) | S (51-53) | M (54-56) | L (57-59) | XL (60-62) |
|---|---|---|---|---|---|---|
| Stack (mm) | 520 | 540 | 561 | 582 | 603 | 629 |
| Reach (mm) | 370 | 382 | 394 | 406 | 418 | 430 |
| Seat tube length (mm) | 420 | 435 | 460 | 495 | 540 | 585 |
| Top tube (effective) (mm) | 507 | 530 | 553 | 577 | 602 | 629 |
| Head tube length (mm) | 72 | 87 | 106 | 126 | 151 | 178 |
| Head tube angle (°) | 68.5 | 70 | 70.5 | 71 | 71 | 71 |
| Seat tube angle (°) | 75.5 | 74.9 | 74.3 | 73.7 | 73.1 | 72.5 |
| Chainstay length (mm) | 436 | 436 | 436 | 436 | 436 | 436 |
| BB drop (mm) | 80 | 80 | 78 | 78 | 76 | 76 |
| Wheelbase (mm) | 1030 | 1036 | 1045 | 1059 | 1080 | 1101 |
| Fork length (mm) | 425 | 425 | 425 | 425 | 425 | 425 |
| Fork offset (mm) | 54 | 54 | 48 | 48 | 48 | 48 |
| Trail (mm) | 86 | 76 | 79 | 75 | 75 | 75 |
| Standover (mm) | 713 | 729 | 755 | 786 | 825 | 863 |
| Head tube length (35mm 3D spacer) (mm) | 95 | 112 | 131 | 151 | 176 | 203 |
| Stack (35mm 3D spacer) (mm) | 543 | 564 | 585 | 606 | 627 | 653 |
| Reach (35mm 3D spacer) (mm) | 361 | 373 | 386 | 398 | 410 | 422 |
Measurements from Argon 18's published geometry, converted from cm to mm. Stack, reach and head tube are shown with no 3D headset spacer; the extra rows show the taller 3D spacer options.
Free UK shipping available on all orders, excluding bikes, wheelsets and packages over 10kg in weight e.g. turbo trainers.
