Velopedia Bicycle Archive
2025 Argon 18 Dark Matter Shimano GRX RX610/822
Original manufacturer specifications including Shimano GRX RX610/822 drivetrain, 700c wheels, geometry for 6 published sizes.
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What Velopedia knows
- Model year
- 2025
- Category
- Gravel & Cyclocross
- Original MSRP
- $3,899.00
- Sizes
- XXS, XS, S, M, L, XL
- Colors
- Anthracite, Cactus Green
- Geometry
- 6 manufacturer sizes · Geometry context
- Record coverage
- 17 preserved details · 3 archived images · original MSRP · preserved geometry
- Archive ID
- 900002359
Frameset
| Frame Construction | Dark Matter |
|---|---|
| Fork | Dark Matter |
Drivetrain
| Component Group | Shimano GRX RX610/822 |
|---|---|
| Shifters | GRX, BL-RX610-L |
| Front Derailleur | N/A |
| Rear Derailleur | GRX RX822, 51T Max |
| Bottom Bracket | Token T47 24mm |
| Cassette | SLX, CS-M7100 10-51T |
| Chain | Shimano CN-M7100 12S |
Brakes
| Brakes | RX400; Rotors: SM-RT70 / F:160mm R:160mm |
|---|
Cockpit & Contact Points
| Stem | FSA SMR-II |
|---|---|
| Saddle | Repente Quasar S 2.0 |
| Seatpost | Argon 18 TDS-C |
Wheels & Tires
| Wheels | DT Swiss G1800 Microspline |
|---|---|
| Front Tire | Vittoria Terreno T50 Mixed 700x50c |
| Rear Tire | Vittoria Terreno T50 Mixed 700x50c |
| Wheel Size | 700c |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | XXS | XS | S | M | L | XL |
|---|---|---|---|---|---|---|
| Seat tube | 420 mm | 435 mm | 460 mm | 495 mm | 540 mm | 585 mm |
| Effective top tube | 507 mm | 530 mm | 553 mm | 577 mm | 602 mm | 629 mm |
| Head tube | 72 mm | 87 mm | 106 mm | 126 mm | 151 mm | 178 mm |
| 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 / rear center | 436 mm | 436 mm | 436 mm | 436 mm | 436 mm | 436 mm |
| Wheelbase | 1030 mm | 1036 mm | 1045 mm | 1059 mm | 1080 mm | 1101 mm |
| Bottom-bracket drop | 80 mm | 80 mm | 78 mm | 78 mm | 76 mm | 76 mm |
| Reach | 370 mm | 382 mm | 394 mm | 406 mm | 418 mm | 430 mm |
| Stack | 520 mm | 540 mm | 561 mm | 582 mm | 603 mm | 629 mm |
| Standover height | 713 mm | 729 mm | 755 mm | 786 mm | 825 mm | 863 mm |
| Fork offset / rake | 54 mm | 54 mm | 48 mm | 48 mm | 48 mm | 48 mm |
| Trail | 86 mm | 76 mm | 79 mm | 75 mm | 75 mm | 75 mm |
| Fork length / axle-to-crown | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
Geometry source: Argon 18 first-party labeled geometry and fit matrix; millimetre fork fields normalized within the centimetre table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
XXS geometry
Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XXS geometry XS geometry
Archive context: Its reach of 382 mm sits toward the longer end. The chainstay of 436 mm sits toward the longer rear-center end. Its bottom-bracket drop of 80 mm sits toward the deeper-drop end.
Compared with 38 distinct cyclocross/gravel geometries in the XS-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XS geometry S geometry
Archive context: Its reach of 394 mm sits toward the longer end. Its trail of 79 mm sits toward the higher-trail end. The chainstay of 436 mm sits somewhat longer than typical.
Compared with 92 distinct cyclocross/gravel geometries in the Small-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S geometry M geometry
Archive context: Its reach of 406 mm sits toward the longer end. Its trail of 75 mm sits toward the higher-trail end. The chainstay of 436 mm sits somewhat longer than typical.
Compared with 103 distinct cyclocross/gravel geometries in the Medium-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze M geometry L geometry
Archive context: Its trail of 75 mm sits toward the higher-trail end. Its reach of 418 mm sits toward the longer end. The chainstay of 436 mm sits somewhat longer than typical.
Compared with 74 distinct cyclocross/gravel geometries in the Large-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze L geometry XL geometry
Archive context: The seat angle of 72.5° sits toward the more relaxed end. Its trail of 75 mm sits toward the higher-trail end. Its reach of 430 mm sits toward the longer end.
Compared with 78 distinct cyclocross/gravel geometries in the XL-equivalent size cohort from model years 2023–2027 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XL geometry Parts & serviceability
Find replacement parts
Shimano CN-M7100 12S
Exact archived model
Vittoria Terreno T50 Mixed 700x50c
Named tire and published size
FSA SMR-II
Named archived component — verify dimensions
More qualified parts (1)
DT Swiss G1800 Microspline
Named archived component — verify dimensions
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameInspect the complete frame and fork in bright light for cracks, dents, distortion, corrosion, impact marks, suspicious paint differences or signs of repair. Check the head tube, bottom-bracket area, dropouts, joints and clamped surfaces especially closely.Inspect the frame and fork →
- BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.Inspect the brakes →
- DrivetrainShift through the full range under light load, measure chain wear and inspect the cassette or freewheel teeth. Skipping or hesitation can indicate wear, poor adjustment or mismatched parts.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
- Bottom bracketTurn the cranks slowly, feel for rough bearings and check for side-to-side play. Creaking under load deserves investigation but does not identify the source by itself.Inspect the bottom bracket and shell →
Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2025 Argon 18 Dark Matter Shimano GRX RX610/822 · Cyclocross/Gravel · Published sizes: XXS, XS, S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Dark Matter · Fork: Dark Matter
Drivetrain
Check drivetrain wear →Archived: Group: Shimano GRX RX610/822 · Shifters: GRX, BL-RX610-L · Rear derailleur: GRX RX822, 51T Max · Bottom bracket: TOKEN T47 24mm · Cassette: SLX, CS-M7100 10-51T · Chain: Shimano CN-M7100 12S
Brakes
Inspect the brakes →Archived: Brakes: RX400; Rotors: SM-RT70 / F:160mm R:160mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c · Wheels: DT Swiss G1800 Microspline · Front tire: Vittoria Terreno T50 Mixed 700x50c · Rear tire: Vittoria Terreno T50 Mixed 700x50c
Controls and contact points
Archived: Stem: FSA SMR-II · Seatpost: Argon 18 TDS-C · Saddle: Repente Quasar S 2.0
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Gallery
Recently checked marketplace data
Market Snapshot
Velopedia did not find a close used eBay listing in the latest snapshot. New and used listings remain separate.
Evidence standard
Fixed-price and Best Offer item prices only
Shipping and tax excluded
Active asks, not completed sales
No close current matches found. Velopedia did not find an eBay listing confident enough to include in the latest snapshot.
Listings shown have not passed their eBay-supplied end time. Velopedia rechecks matched bicycles on a protected weekly cycle; availability can still change between checks. Price calculations use active fixed-price and Best Offer item prices before shipping and tax. Auction bids, auction-only prices, classified ads, lower-confidence Review candidates and ended listings are excluded. These observations are not completed-sale prices, a certified appraisal or a guarantee of value.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.