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Today’s DealsSum Pro SRAM Rival eTap AXS
A carbon frame race bike with upper mid-range components and sram rival hydraulic disc brakes.
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Manufacturer Price
$6,600| Frame | Carbon |
|---|---|
| Fork | Carbon |
| Wheels | 700c Aluminum |
| Drivetrain | 2 × 12 Electronic |
| Groupset | Rival AXS |
| Brakes | SRAM Rival Hydraulic Disc |
Summary
The Argon 18 Sum is a competitive race bike that blends aero and lightweight performance, offering sharp handling and stability at speed. While it excels in efficiency and comfort, some reviews question its value and component choices. The bike is praised for its refined ride characteristics and is often compared to top-tier models like the Specialized Tarmac and Canyon Ultimate CF SLX.
High stiffness
Fast all round performance
Easy handling
Refined ride characteristics
Improved compliance on rough roads
Lacklustre finishing kit
Relative value
High price point
Aggressive ride position may not suit all
Firm ride quality
I’ve been very impressed with the Sum Pro’s turn of speed and predictable-but-sharp handling, and I’m convinced it’s a great platform for racing.
With 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.
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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 design
Stiff with responsive handling
Well-matched components
Aggressive, low geometry
32mm tire clearance
Steep head tube angle for quick steering
Stable at speed with 99cm wheelbase
Cornering highlight
Taller gearing for more speed
Hunt wheels improve tire grip and compliance
Heavy wheelset (1711g)
Alloy handlebar instead of carbon (future update planned)
No premium build with SRAM Red AXS and lighter wheels
Sum Pro model expensive ($8900)
| Frame | SUM Pro BB Standard: BB86/BB92, 86.5mm, Press Fit Tire Clearance: 30c Color: Crystal Black Gloss |
|---|---|
| Fork | SUM Pro specific |
| Bottom Bracket | SRAM DUB PF 86.5 |
| Headset | FSA ACR NO.55R 1.5'' |
| Handlebar | Ciclovation LEATHER TOUCH Tornado Gloss |
| Saddle | Repente Prime 3.0 |
| Seatpost | SUM specific (included with frameset) Type: Rigid |
| Rear Derailleur | SRAM Rival eTAP AXS (MAX 36T) |
|---|---|
| Front Derailleur | SRAM Rival eTAP AXS |
| Crank | SRAM Rival DUB 48/35 |
| Shifters | SRAM Rival eTap AXS |
| Cassette | SRAM Rival AXS XG 1250 10-30 |
| Chain | SRAM Rival 12S 114L |
| Brakes | SRAM Rival Type: SRAM Rival Hydraulic Disc |
| Brake Levers | SRAM Rival eTap AXS |
| Rims | 35mm |
|---|---|
| Tires | Vittoria Corsa TLR G2.0 700x25c |
| Disc Rotors | SRAM Centerlock Centerline / F:160mm R:140mm |
First added February 28
Last updated February 10
Not listed for 860 days