Velopedia Bicycle Archive
2026 Argon 18 Equation Shimano 105 Di2
Original manufacturer specifications including Shimano 105 Di2 drivetrain, 700c wheels, geometry for 6 published sizes.
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What Velopedia knows
- Model year
- 2026
- Category
- Road
- Original MSRP
- $4,299.00
- Sizes
- XXS, XS, S, M, L, XL
- Geometry
- 6 manufacturer sizes · Geometry context
- Record coverage
- 18 preserved details · 2 archived images · original MSRP · preserved geometry
- Archive ID
- 900002293
Frameset
| Frame Construction | Equation |
|---|---|
| Fork | Equation |
Drivetrain
| Component Group | Shimano 105 Di2 |
|---|---|
| Shifters | Shimano 105 Di2 R7150 |
| Front Derailleur | Shimano 105 Di2 R7150 |
| Rear Derailleur | Shimano 105 Di2 R7150 |
| Bottom Bracket | Shimano BB-RS500 |
| Cassette | Shimano 105 CS-R7100 11-34 |
| Chain | Shimano 105 CN-M7100 |
Brakes
| Brakes | Shimano 105 Di2 R7170; Rotors: Shimano RT-CL700 / F:160mm R:160mm |
|---|
Cockpit & Contact Points
| Headset | FSA NO.69 SRS System |
|---|---|
| Stem | FSA Omega Pro ST-167 |
| Saddle | Repente Quasar S |
| Seatpost | Argon 18 TDS-C |
Wheels & Tires
| Wheels | ATTEN L42 wheelset |
|---|---|
| Front Tire | Vittoria Zaffiro Pro 700x30c |
| Rear Tire | Vittoria Zaffiro Pro 700x30c |
| 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 | 450 mm | 485 mm | 520 mm | 555 mm | 590 mm |
| Effective top tube | 496 mm | 516 mm | 537 mm | 558 mm | 580 mm | 604 mm |
| Head tube | 84 mm | 101 mm | 120 mm | 141 mm | 166 mm | 189 mm |
| Head-tube angle | 70.3° | 71.3° | 72° | 72° | 72° | 72.5° |
| Seat-tube angle | 75.5° | 74.9° | 74.3° | 73.7° | 73.1° | 72.5° |
| Chainstay / rear center | 417 mm | 417 mm | 420 mm | 420 mm | 420 mm | 420 mm |
| Wheelbase | 981 mm | 989 mm | 997 mm | 1013 mm | 1030 mm | 1043 mm |
| Bottom-bracket drop | 80 mm | 80 mm | 78 mm | 78 mm | 75 mm | 75 mm |
| Reach | 359 mm | 369 mm | 379 mm | 388 mm | 397 mm | 407 mm |
| Stack | 518 mm | 537 mm | 558 mm | 578 mm | 600 mm | 623 mm |
| Standover height | 673 mm | 700 mm | 734 mm | 764 mm | 797 mm | 827 mm |
| Fork offset / rake | 52 mm | 52 mm | 47 mm | 47 mm | 47 mm | 47 mm |
| Trail | 68 mm | 61 mm | 62 mm | 62 mm | 62 mm | 59 mm |
| Fork length / axle-to-crown | 387 mm | 387 mm | 387 mm | 387 mm | 387 mm | 387 mm |
Geometry source: Argon 18 first-party labeled geometry and fit matrix ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
XXS geometry
Archive context: Its bottom-bracket drop of 80 mm sits toward the deeper-drop end. The seat angle of 75.5° sits toward the steeper end. Its reach of 359 mm sits toward the shorter end.
Compared with 37 distinct road geometries in the XXS-equivalent size cohort from model years 2024–2027 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 XXS geometry XS geometry
Archive context: Its bottom-bracket drop of 80 mm sits toward the deeper-drop end. Its trail of 61 mm sits toward the lower-trail end. Its stack of 537 mm sits toward the taller end.
Compared with 69 distinct road geometries in the XS-equivalent size cohort from model years 2024–2027 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 bottom-bracket drop of 78 mm sits toward the deeper-drop end. Its stack of 558 mm sits toward the taller end. The chainstay of 420 mm sits somewhat longer than typical.
Compared with 93 distinct road geometries in the Small-equivalent size cohort from model years 2024–2027 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 bottom-bracket drop of 78 mm sits toward the deeper-drop end. Its stack of 578 mm sits toward the taller end. Its wheelbase of 1013 mm sits toward the longer end.
Compared with 93 distinct road geometries in the Medium-equivalent size cohort from model years 2024–2027 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: The head angle of 72° sits toward the slacker end. Its stack of 600 mm sits toward the taller end. Its trail of 62 mm sits toward the higher-trail end.
Compared with 82 distinct road geometries in the Large-equivalent size cohort from model years 2024–2027 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 bottom-bracket drop of 75 mm sits toward the deeper-drop end. Its stack of 623 mm sits toward the taller end.
Compared with 67 distinct road geometries in the XL-equivalent size cohort from model years 2024–2027 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 105 CN-M7100
Exact archived model
Shimano 105 CS-R7100 11-34
Exact archived model
Vittoria Zaffiro Pro 700x30c
Named tire and published size
More qualified parts (6)
Shimano 105 Di2 R7170
Brake model identified — verify pad shape
Shimano BB-RS500
Exact archived model
Shimano 105 Di2 R7150
Component family — verify exact version
Shimano 105 Di2 R7150
Component family — verify exact version
Shimano 105 Di2 R7150
Component family — verify exact version
FSA NO.69 SRS System
Exact archived model
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 →
- DrivetrainConfirm every shift-system battery charges, every shift control works and the derailleur moves cleanly across the cassette. Make sure the matching shift-system charger is included, then measure chain wear and inspect the cassette teeth.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 →
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: 2026 Argon 18 Equation Shimano 105 Di2 · Road · Published sizes: XXS, XS, S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Equation · Fork: Equation
Drivetrain
Check drivetrain wear →Archived: Group: Shimano 105 Di2 · Shifters: Shimano 105 Di2 R7150 · Front derailleur: Shimano 105 Di2 R7150 · Rear derailleur: Shimano 105 Di2 R7150 · Bottom bracket: Shimano BB-RS500 · Cassette: Shimano 105 CS-R7100 11-34 · Chain: Shimano 105 CN-M7100
Brakes
Inspect the brakes →Archived: Brakes: Shimano 105 Di2 R7170; Rotors: Shimano RT-CL700 / F:160mm R:160mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c · Wheels: ATTEN L42 wheelset · Front tire: Vittoria Zaffiro Pro 700x30c · Rear tire: Vittoria Zaffiro Pro 700x30c
Controls and contact points
Archived: Headset: FSA NO.69 SRS System · Stem: FSA Omega Pro ST-167 · Seatpost: Argon 18 TDS-C · Saddle: Repente Quasar S
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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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.