Bikes up to 60% offWe monitor over 40,000 bikes daily to find the best prices
Today’s Deals2025 Argon 18
Sum SRAM Rival AXS
A carbon frame race bike with upper mid-range components and sram rival hydraulic disc brakes.
Compare the full range
Manufacturer Price
$5,250| Frame | Carbon |
|---|---|
| Fork | Carbon |
| Wheels | 700c Carbon |
| Drivetrain | 2 × 12 Electronic |
| Groupset | Rival AXS |
| Brakes | SRAM Rival Hydraulic Disc |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Sum model range
View ComparisonSummary
The Argon 18 Sum is a high-performance race bike that excels in speed, handling, and aerodynamic efficiency, though it may sacrifice some comfort on rougher roads. Its lightweight design and aggressive geometry make it ideal for criterium racing and fast-paced rides. While it offers a range of sizing and fit options, some reviews note its high price point and specific use case as potential drawbacks.
Undeniably fast
Impressively rapid acceleration
Great handling
Aerodynamic optimization with lightweight design
Generous range of sizing
Harsh on rougher roads
High price point
Very specific use
Sacrifices made for rapid acceleration and handling
No power meter included
Going fast is at the heart of what we do, no compromises made.
CyclistThe Sum Pro is undoubtedly a quick and able race bike.
BikeRadarWith a focus on blending aero and lightweight performance details to create a modern road bike, the Sum Pro boasts the type of refined ride characteristics that any performance-oriented rider would need.Road Bike Action
The Sum is a bike that performs admirably in almost all situations, and while it isn't particularly light, it is difficult to fault as an all-rounder.
road.ccFeedback?
View all reviews
Jun 2024 · Katherine Moore
First released in 2022, the Argon 18 Sum Pro has replaced both the brand’s aero race bike, the Nitrogen Pro,
Undeniably fast
Impressively rapid acceleration
Great handling
Very specific use
Harsh on rougher roads
Wide handlebar
No power meter included
Nov 2023 · Ashley Quinlan
Rapid performance shines through, but not without flaws
High stiffness
Fast all round performance
Easy handling
Lacklustre finishing kit
Relative value
Dec 2022 · Matt Page
A superbly confident, fast and comfortable bike, but a question mark on the pricing...
Comfortable ride
Confident downhill
Value – sum of its parts is less than the full build cost
Press-fit BB won’t please all
Mech hanger attachment
Nov 2022 · RBA Staff
The Argon 18 Sum Pro melds the benefits of two worlds
Blends aero and lightweight performance
Engineered clearance for up to 32mm tires
Steep head tube angle for quick handling
Stable at speed due to 99cm wheelbase
Tall gearing (48/35 chainrings) for added speed
Wide Hunt wheels improve tire grip and compliance
Internal routing and wireless shifting for clean look
6 sizes available
Hunt wheels are heavy (1711g)
No premium build with SRAM Red AXS
Alloy handlebar instead of carbon
Premium build price $8900
| Frame | SUM BB Standard: BB86/BB92, 86.5mm, Press Fit Tire Clearance: 30c Colors: British Racing Green; Smoked Nickel |
|---|---|
| Fork | SUM specific |
| Bottom Bracket | SRAM DUB PF 86.5 |
| Headset | FSA Headset NO.55R 1.5'' + 3D |
| Handlebar | Ciclovation LEATHER TOUCH Tornado Gloss |
| Saddle | Repente Quasar |
| Seatpost | SUM specific Type: Rigid |
| Rear Derailleur | SRAM Rival AXS |
|---|---|
| Front Derailleur | SRAM Rival AXS |
| Crank | SRAM Rival AXS DUB 48/35 |
| Cassette | SRAM XG 1250 10-30 XDR |
| Chain | SRAM Rival 12S |
| Brakes | SRAM RIVAL AXS Shifter/Caliper Set Type: SRAM Rival Hydraulic Disc |
| Brake Levers | SRAM Rival AXS |
| Rims | Scope S4.A |
|---|---|
| Tires | Vittoria Corsa N.EXT TLR 28mm |
| Disc Rotors | SRAM Centerlock Paceline / F:160mm R:140mm |
First added November 16
Last updated February 28
Not listed for 104 days