Argon 18 Sum Frameset
This bike is available through the Cycle to Work Scheme
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Book a sizing appointment in our bike fit studio and get the right fit.
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- 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
Build it your way. The Sum frameset gives you Argon 18's lightweight road platform — planted and responsive, with a ride quality most aero frames can't match — ready for the build of your choice.
Key features
- Elite Level Layup carbon
- Hourglass-shaped headtube and draft-deflecting fork blades
- Aero-profile downtube shaping
- D-shaped seatpost with integrated clamp
- 3D System for fit adjustability
- Topological Compliance System (TCS)
- Argon Fit System — size-specific geometry
Frame
| Layup | Elite Level Layup carbon |
|---|---|
| Fork | Carbon, draft-deflecting blades |
| Seatpost | D-shaped with integrated clamp |
| Geometry | Road Race Geometry |
Builds
- Frameset — £1,750
All sizes: XXS (44-46), XS (47-50), S (51-53), M (54-56), L (57-59), XL (60-62).
Frameset contents: Argon 18 do not publish a full frameset inclusions list on their GB site. Please confirm exact package contents with us before ordering.
Sizes and fit
Available in frame sizes XXS (44-46), XS (47-50), S (51-53), M (54-56), L (57-59) and XL (60-62). Each size has its own Road Race Geometry under the Argon Fit System, with the 3D System for fit adjustability.
Colours
Available in Smoked Nickel and British Racing Green.
Materials and construction
- Frame: Elite Level Layup carbon
- Fork: carbon, with draft-deflecting blades
- Seatpost: D-shaped with an integrated clamp
- Hourglass-shaped headtube and aero-profile downtube shaping
- Topological Compliance System (TCS)
- 3D System and Argon Fit System
- Frameset contents: Argon 18 do not publish a full frameset inclusions list, so please confirm the exact package contents with us before ordering
Frameset
- Frame: Sum, Elite Level Layup carbon, hourglass head tube, aero-profile down tube, Topological Compliance System
- Fork: Carbon, draft-deflecting blades
- Seatpost: D-shaped, integrated clamp
- Fit: 3D System and Argon Fit System
| Size | XXS (44-46) | XS (47-50) | S (51-53) | M (54-56) | L (57-59) | XL (60-62) |
|---|---|---|---|---|---|---|
| Stack (mm) | 471 | 493 | 516 | 540 | 565 | 592 |
| Reach (mm) | 375 | 382 | 389 | 397 | 405 | 414 |
| Seat tube length (mm) | 395 | 425 | 460 | 505 | 550 | 595 |
| Top tube (effective) (mm) | 503 | 520 | 538 | 557 | 578 | 600 |
| Head tube length (mm) | 69 | 85 | 101 | 126 | 152 | 180 |
| Head tube angle (°) | 71.2 | 72.1 | 72.7 | 72.7 | 72.7 | 73 |
| Seat tube angle (°) | 75 | 74.5 | 74 | 73.5 | 73 | 72.5 |
| Chainstay length (mm) | 410 | 410 | 410 | 410 | 410 | 410 |
| BB drop (mm) | 69 | 73 | 77 | 77 | 77 | 77 |
| Wheelbase (mm) | 967 | 972 | 975 | 990 | 1006 | 1020 |
| Standover (mm) | 676 | 700 | 727 | 766 | 804 | 841 |
| Head tube length (15mm 3D spacer) (mm) | 84 | 100 | 116 | 141 | 167 | 195 |
| Head tube length (25mm 3D spacer) (mm) | 94 | 110 | 126 | 151 | 177 | 205 |
| Stack (15mm 3D spacer) (mm) | 485 | 507 | 530 | 554 | 579 | 606 |
| Stack (25mm 3D spacer) (mm) | 495 | 517 | 540 | 564 | 589 | 616 |
| Reach (15mm 3D spacer) (mm) | 370 | 377 | 385 | 393 | 401 | 410 |
| Reach (25mm 3D spacer) (mm) | 367 | 374 | 382 | 390 | 398 | 407 |
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.
