Good to know: Integrated cockpit
Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.
Geometry ?
Argon 18 Sum Pro 2026 geometry in sizes XXS–XL: stack 471–592 mm, reach 375–414 mm, head angle 71.2–73°.
| XXS | XS | S | M | L | XL | |
|---|---|---|---|---|---|---|
| Stack | 471 mm | 493 mm | 516 mm | 540 mm | 565 mm | 592 mm |
| Reach | 375 mm | 382 mm | 389 mm | 397 mm | 405 mm | 414 mm |
| Head angle | 71.2° | 72.1° | 72.7° | 72.7° | 72.7° | 73° |
| Seat angle | 75° | 74.5° | 74° | 73.5° | 73° | 72.5° |
| Seat tube (c-t) | 395 mm | 425 mm | 460 mm | 505 mm | 550 mm | 595 mm |
| Head tube | 69 mm | 85 mm | 101 mm | 126 mm | 152 mm | 180 mm |
| Top tube (effective) | 503 mm | 520 mm | 538 mm | 557 mm | 578 mm | 600 mm |
| BB drop | 69 mm | 73 mm | 77 mm | 77 mm | 77 mm | 77 mm |
| Chainstay | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 967 mm | 972 mm | 975 mm | 990 mm | 1006 mm | 1020 mm |
| Standover | 676 mm | 700 mm | 727 mm | 766 mm | 804 mm | 841 mm |
| Stock build by size | ||||||
| Cranks | 165 mm | 170 mm | 170 mm | 172.5 mm | 172.5 mm | 175 mm |
| Stem | 70 mm | 80 mm | 90 mm | 100 mm | 110 mm | 120 mm |
| Bar width | 380 mm | 380 mm | 380 mm | 400 mm | 400 mm | 420 mm |
Source: argon18.com, checked 1 Nov 2026 · bar position: worked out from published data
Stock build
Sum Pro SRAM RED AXS €9,450
- Groupset
- SRAM Red AXS 2×12
- Shifters
- SRAM RED AXS Shifter Set
- Cranks
- SRAM Red AXS Powermeter 48/35
- Stem
- Vision Metron 5D ACR EVO
- Handlebar
- Vision Metron 5D ACR EVO
- Seatpost
- SUM specific
- Saddle
- Repente Prime 3.0
- List price
- €9,450 (argon18.com, 1 Nov 2026)
Sum Pro Shimano Dura-Ace Di2 €8,750
- Groupset
- Shimano Dura-Ace Di2 R9200 2×12
- Shifters
- Shimano Dura-Ace Di2 R9270
- Cranks
- Shimano Dura-Ace R9200 52/36
- Stem
- Vision Metron 5D ACR EVO
- Handlebar
- Vision Metron 5D ACR EVO
- Seatpost
- SUM specific (included with frameset)
- Saddle
- Repente Quasar CR Carbon Rail
- List price
- €8,750 (argon18.com, 1 Nov 2026)
Sum Pro Shimano Ultegra Di2 €6,125
- Groupset
- Shimano Ultegra Di2 R8100 2×12
- Shifters
- Shimano Ultegra Di2 R8170
- Cranks
- Shimano Ultegra R8100 52/36
- Stem
- Vision Metron 5D ACR EVO
- Handlebar
- Vision Metron 5D ACR EVO
- Seatpost
- SUM specific (included with frameset)
- Saddle
- Repente Quasar CR Carbon Rail
- List price
- €6,125 (argon18.com, 1 Nov 2026)
Source for all builds: argon18.com, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size XXS (stack 471 / reach 375 mm).
Argon 18 Sum (2026)size XXS · stack 471 / reach 375 mmJava Fuoco Top (2026)size 450 · stack 478 / reach 371 mmPardus Spark Evo (2026)size XXS · stack 470 / reach 366 mmDare Va Afo (2026)size 2XS · stack 480 / reach 372 mmIkuista Vektori (2026)size XS · stack 480 / reach 372 mmBianchi Oltre Race (2026)size 44 · stack 481 / reach 376 mm
Stack and reach within 12 mm of size XS (stack 493 / reach 382 mm).
Argon 18 Sum (2026)size XS · stack 493 / reach 382 mmPanasonic FRTD05 (2026)size 460 · stack 492 / reach 383 mmPanasonic FRTD11 (2026)size 460 · stack 492 / reach 383 mmPolygon Strattos S Alx (2024)size XS · stack 494 / reach 382 mmPolygon Strattos S Carbon (S6D/S7D) (2026)size XS · stack 495 / reach 382 mmMountain Peak Aero (2026)size 440 · stack 496 / reach 384 mm
Stack and reach within 12 mm of size S (stack 516 / reach 389 mm).
Argon 18 Sum (2026)size S · stack 516 / reach 389 mmCube Litening Aero C:68X (2027)size 50 · stack 514 / reach 389 mmCube Litening AIR C:68X (2027)size 50 · stack 514 / reach 389 mmPardus Spark Evo (2026)size M · stack 516 / reach 391 mmPanasonic FRCD07 (2026)size 500 · stack 517 / reach 387 mmTwitter T8 (2026)size 48 · stack 517 / reach 387 mm
Stack and reach within 12 mm of size M (stack 540 / reach 397 mm).
Argon 18 Sum (2026)size M · stack 540 / reach 397 mmPanasonic FRTD05 (2026)size 560 · stack 541 / reach 398 mmPanasonic FRTD11 (2026)size 560 · stack 541 / reach 398 mmBisan Reload Disc (2026)size 52 cm · stack 540 / reach 395 mmBisan Reload Rim (2026)size 52 cm · stack 540 / reach 395 mmBottecchia Aerospace (2026)size 53 · stack 538 / reach 396 mm
Stack and reach within 12 mm of size L (stack 565 / reach 405 mm).
Argon 18 Sum (2026)size L · stack 565 / reach 405 mmRitchey Garden City (2026)size L · stack 565 / reach 406 mmCipollini RB1K Ad One (2026)size XL · stack 564 / reach 406 mmCorratec CCT Evo (2026)size 57 · stack 565 / reach 404 mmCorratec CCT Team (2026)size 57 · stack 565 / reach 404 mmSeven A-738 Allroad (Aero Fit) (2026)size 57 · stack 563 / reach 405 mm
Stack and reach within 12 mm of size XL (stack 592 / reach 414 mm).
Argon 18 Sum (2026)size XL · stack 592 / reach 414 mmCurve Belgie Disc (2026)size 58 · stack 592 / reach 414 mmCorratec CCT Evo (2026)size 60 · stack 592 / reach 413 mmCorratec CCT Team (2026)size 60 · stack 592 / reach 413 mmQuick Pro ER:ONE (2026)size XXL/584 · stack 593 / reach 415 mmRitchey Garden City (2026)size XL · stack 594 / reach 415 mm
Spotted a mistake or a missing build? Let me know.