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With huge 57mm tyre clearnace, smart fit adjustability and storage, the Argon 18 Dark Matter with Sram Rival XPLR AXS is a serious gravel adventure bike that will handle the toughest routes with ease and in comfort.
With huge 57mm tyre clearnace, smart fit adjustability and storage, the Argon 18 Dark Matter with Sram Rival XPLR AXS is a serious gravel adventure bike that will handle the toughest routes with ease and in comfort.
Argon 18

Argon 18 Dark Matter Gravel Bike : SRAM Rival XPLR AXS : Anthracite

£4,500.00
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If you are not completely satisfied with your purchase, simply return the item or items to us in their original condition* within 30 days of receipt. You must notify us in writing within 14 working days of placing your order, by post or email of your intention to do this.

RETURN ADDRESS:

Returns Department
7hundred Ltd
68 Peascod Street
Windsor
SL4 1DE

We will issue a refund, credit or exchange the item for a different size / colour if preferred. Delivery charges are only refundable if you have canceled your entire order within the 7 day Cooling-Off Period or where the goods are faulty and a refund is made.

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If the item you received is faulty, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return. You have 30 days from receipt of the faulty item to notify us of your intent to return it and a further 30 days in which to do so.

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All refunds will be given as soon as possible, and usually take the form of a refund transaction onto the card used for the original purchase. At the very latest we will refund your money within 28 days from the day we receive your returned item. In the case of incorrect ordering and undisclosed reasons for return, a credit or exchange may be issued and the customer will be expected to pay the return postage costs.

All returns must be accompanied by a completed returns form and a copy of the original invoice.



You can submit a returns form here:

Returns Form

Argon 18 Dark Matter Gravel Bike : SRAM Rival XPLR AXS : Anthracite

Season:2026

Brand:Argon 18

Code:A18DMANTRVLXPLR

The Argon 18 Dark Matter is a high-performance carbon gravel bike designed for adventurers and racers alike, blending speed, versatility, and durability to tackle everything from rough gravel races to remote bikepacking expeditions.

The Dark Matter has evolved since its 2018 debut, with the latest 2025 updates emphasising massive tyre clearance, smart storage solutions, and optimised geometry for stability and efficiency on mixed terrain. It's positioned as an "ultimate gravel machine" that powers through ruts, rocks, washboard, washouts, and dusty single tracks, making it ideal for riders seeking a do-it-all bike that doesn't compromise on performance. Keenly priced, it is an accessible platform for mid-range builds while offering premium features typically found in higher-end bikes.

Design and Frame

At its core, the Dark Matter features a full-carbon frame and fork engineered with Argon 18's proprietary technologies for a balance of stiffness, compliance, and aerodynamics. The frame uses a Topological Compliance System (TCS) to provide vertical compliance and vibration damping without sacrificing lateral rigidity, ensuring a smooth ride on rough surfaces while maintaining responsive handling. The gravel-specific geometry draws from endurance road designs, offering an aggressive yet comfortable position for long rides. It's optimised for 1x drivetrains but includes an optional front derailleur mount for 2x compatibility. The bike also incorporates a threaded T47 bottom bracket for easy maintenance and a 27.2mm seatpost diameter, which enhances comfort and allows for dropper post compatibility.

Key design highlights include internal cable routing via the FSA ACR system for a clean look and reduced drag, plus mounts for mudguards, racks, and bags to support bikepacking. The fork features internal dynamo routing for powering lights or devices on extended adventures, and the frame supports gravel suspension forks for added versatility in technical terrain.

Key Features

  • Tyre Clearance: Up to 57mm (700c) for massive traction and capability on loose or muddy surfaces: MTB-level clearance in a gravel package.
  • Storage Optimisation: Integrated downtube storage for tools, nutrition, or spares, plus an optional integrated tool-kit for on-the-go repairs.
  • 3D Fit System: Adjustable headset spacers for customised stack height, optimising fit without compromising steerer tube integrity.
  • Universal Derailleur Hanger (UDH): Ensures easy sourcing of replacements and future-proof compatibility.
  • Argon Fit System: Size-specific geometries for consistent handling across all frame sizes.

These features make the Dark Matter stand out for its practicality and will appeal to riders who prioritise adventure over pure racing.

Geometry and Sizing

The Dark Matter's geometry is rugged yet responsive, with a slacker head angle for stability on descents and a longer wheelbase for confidence in rough terrain. Available in sizes XXS to XL, it uses the Argon Fit System for proportional scaling. Stack and reach are adjustable via the 3D System, providing up to 30mm of customisation for fit.

Build Options and Pricing

Argon 18 offers three main builds::

  • Shimano GRX RX610/822 (mechanical 1x): Entry-level at £3,500; alloy DT G1800 wheels, reliable for everyday gravel.
  • SRAM Rival XPLR AXS: Mid-range at £4,500; wireless shifting for smooth performance.
  • SRAM Force XPLR AXS: Top spec at £6,500; lighter components for race-oriented riders.

Colour options include Root Beer, Anthracite and Cactus Green.

Praised for its fun, fast ride quality, with compliant forks and frame that absorb vibrations effectively, the Dark Matter is comfortable for long hauls. It's versatile enough to be a "one-bike quiver" for gravel, light MTB trails, or even road use with tyre swaps. It represents excellent value for money and is a rider favourite for all-terrain adventure

The Argon 18 Dark Matter excels as a robust, feature-packed gravel bike for those who crave big tyres, big adventures, and reliable performance without the need for constant racing.

  • €5,196.60
    EUR
  • $7,097.33
    AUD
  • $6,913.17
    CAD
  • $8,665.66
    NZD
  • $5,054.90
    USD
  • CHF3,998.35
    CHF
  • kr56,434.17
    SEK
  • kr622,712.52
    ISK
  • kr38,833.30
    DKK
  • kr47,166.47
    NOK
  • ¥811,727.71
    JPY
  • Technical Information
    Frame
    Dark Matter
    Fork
    Dark Matter
    Integrated Cables
    Yes
    Storage Optimization System
    Yes


    Wheels
    DT Swiss G1800 XDR
    Tyres
    Schwalbe G-One RX PRO, TLR 700x50c
    Tyre Clearance
    57mm

    Bottom Bracket
    SRAM BB DUB T47 Wide
    Front Derailleur
    N/A
    Rear Derailleur
    SRAM Rival XPLR AXS E1
    Crankset
    SRAM Rival XPLR, 40T
    Chain
    SRAM Rival Chain E1
    Cassette
    SRAM Rival XPLR XG-1351, 10-46T

    Brakes
    SRAM Rival AXS E1
    Rotors
    SRAM Centerlock Paceline / F:160mm R:160mm
    Shifters
    SRAM Rival AXS E1

    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
    Sizing Information




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