Argon 18 Sum Frame
What the checker says170will not fit13check before you buy60worth knowing
Run variant by variant through the road bike builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 1001 verified road bike parts in this catalog. 779 produced no finding of any kind; that is Sum Pro Frameset (2025). Sum Frameset (2025) clears 778. Each variant produces 87 to 88 distinct errors and 8 distinct warnings.
Will not fit
- Will not fiterror · SeatpostSeatpost mismatch: Argon 18 Sum Frameset takes only its own proprietary (aero/D-shaped) post - a round 27.2mm post does not fit. On 31 of the 58 verified seatposts in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · SeatpostSeatpost mismatch: Argon 18 Sum Pro Frameset takes only its own proprietary (aero/D-shaped) post - a round 27.2mm post does not fit. On 31 of the 58 verified seatposts in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · Front WheelBrake system mismatch: Frame = disc, Front wheel = rim. Disc and rim-brake parts do not mix on one build. On 7 of the 101 verified front wheels in this catalog. Applies to all 2 variants.
- Will not fiterror · Rear WheelBrake system mismatch: Frame = disc, Rear wheel = rim. Disc and rim-brake parts do not mix on one build. On 7 of the 112 verified rear wheels in this catalog. Applies to all 2 variants.
- Will not fiterror · Front CaliperBrake system mismatch: Frame = disc, Front brake = rim. Disc and rim-brake parts do not mix on one build. On 6 of the 35 verified calipers in this catalog. Applies to all 2 variants.
- Will not fiterror · Rear CaliperBrake system mismatch: Frame = disc, Rear brake = rim. Disc and rim-brake parts do not mix on one build. On 6 of the 35 verified calipers in this catalog. Applies to all 2 variants.
- Will not fiterror · Shifter/Brake LeversBrake system mismatch: Frame = disc, Levers = rim. Disc and rim-brake parts do not mix on one build. On 3 of the 25 verified shifter/brake levers in this catalog. Applies to all 2 variants.
Rg bb shell, Bottom Bracket. 72 more findings from the same check, on up to 1 of the 44 verified bottom brackets each.
Rg seatpost, Seatpost. 51 more findings from the same check, on up to 2 of the 58 verified seatposts each.
Rg rear axle, Rear Wheel. 14 more findings from the same check, on up to 1 of the 112 verified rear wheels each.
Rg steerer, Fork. 12 more findings from the same check, on up to 1 of the 17 verified forks each.
Rg brake mount, Rear Caliper. 6 more findings from the same check, on up to 1 of the 35 verified calipers each.
Rg wheel size, Front Tire. 2 more findings from the same check, on up to 2 of the 79 verified tires each.
Rg wheel size, Front Wheel. 2 more findings from the same check, on up to 1 of the 101 verified front wheels each.
Rg wheel size, Rear Tire. 2 more findings from the same check, on up to 2 of the 79 verified tires each.
Rg wheel size, Rear Wheel. 2 more findings from the same check, on up to 1 of the 112 verified rear wheels each.
Open a variant in the builder to see the ones that apply to your own parts.
Check before you buy
- Check before you buywarning · Rear TireTire clearance: the 32mm tire is at the limit of the 32mm the maker states as a measured clearance. A printed tire width carries about 3mm of tolerance and grows with internal rim width, pressure and use, so measure your own clearance before buying. On 15 of the 79 verified tires in this catalog. Applies to all 2 variants.
- Check before you buywarning · Rear TireTire clearance: the 30mm tire is at the limit of the 32mm the maker states as a measured clearance. A printed tire width carries about 3mm of tolerance and grows with internal rim width, pressure and use, so measure your own clearance before buying. On 13 of the 79 verified tires in this catalog. Applies to all 2 variants.
Rg tire clearance, Rear Tire. 10 more findings from the same check, on up to 2 of the 79 verified tires each.
Rg tire clearance near, Rear Tire. 1 more finding from the same check, on up to 2 of the 79 verified tires each.
Open a variant in the builder to see the ones that apply to your own parts.
Worth knowing
Rg bb advisory, Crankset. 54 more findings from the same check, on up to 1 of the 54 verified cranksets each.
Rg xplr udh, Rear Derailleur. 6 more findings from the same check, on up to 1 of the 29 verified rear derailleurs each.
Open a variant in the builder to see the ones that apply to your own parts.
$1,875.00 to $3,300.00 MSRP
What the maker states
- Rear axle
- 12x142
- Bottom bracket
- Bottom-bracket shell bb86
- Seatpost
- Proprietary
- Maximum tire
- Tire up to 32 mm (maker-stated maximum)
- Wheel sizes
- Built for 700c wheels
- Brake system
- Disc-flat
2 verified variants
| Variant | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|
| Sum Pro Frameset (2025) | $3,300.00 | not stated | maker’s page | 2026-07-22 | Build with this |
| Sum Frameset (2025) | $1,875.00 | not stated | maker’s page | 2026-07-28 | Build with this |
The rest of what the maker states5 stated·1 not published
- Brake mount flat-mount.
- Steerer Tapered (1.5-1.125).
- Maximum tire basis: clearance.
- Front-derailleur mount braze-on.
- Sold as a frame only.
1 further field the checker looks for is not published by Argon 18, so we leave it blank rather than estimate it, and that check stays silent on this frame. It is maximum rear rotor. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-22 to 2026-07-28.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 3T Aeroflux Integrale (Handlebar) No conflicts found
- 3T Apto Stealth Stem (Stem) No conflicts found
- 3T Superergo LTD (standard, non-INTEGRALE) (Handlebar) No conflicts found
- Argon 18 SUM D-Shape Seatpost (Seatpost) Will not fit
- BMC Roadmachine 01 Fork (Fork) Will not fit
- BMC Seatpost AS8 (Teammachine R 01) (Seatpost) Will not fit
6 of 665 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.