Sum

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Own the season: the Sum will get you ahead on the climbs, keep you there on the flats, and power you through the sprints. Featuring the same optimal balance of aero and weight as the Sum Pro, the Sum is your all-around KOM-hunter.

Available late 2022.

Build options:
SRAM Force eTap AXS $6,200
SRAM Rival eTap AXS $5,200
More details
Color: Podium Grey Gloss

All images on this page are used for illustrative purposes only. Actual bike specifications may vary depending on country and assembly options available. Please refer to the Features and Configurations section below for options available in your region.

All Together Faster

Decisions, decisions… made easy. With a bike that gives you flat-out advantage on the climbs, the sprints and the straightaways, the only decision you’ll need to make is how nice you want to be to the other guys. A rider-oriented design approach ensures a frame that is both rooted and responsive, with a ride experience most aero frames can’t match. With a layup engineered to maximise aerodynamics while keeping weight low, the design process for the Sum allowed us to strip away all unnecessary weight within the new aero profile tube shapes - all while maintaining maximum power transfer.

Ideal for

From the classics to the centuries, the Sum is engineered to keep you in churning out the watts no matter what the course - or the competition - throws at you.

Core Technologies

Argon Fit System

Argon Fit System is designed to provide riders of all sizes with consistent performance and optimal positioning.

Road Race Geometry

Our road race geometry is designed around the razor-sharp reflexes and precision handling required for racers of all levels.

Elite Level Layup

We believe the discerning cyclist deserves more than just trickle-down technology. Our Elite level bikes benefit from the same attention to detail as our Pro level ones.

Topological Compliance System

To achieve the optimal balance of comfort and performance for our endurance line, we needed geometry uniquely aligned with the demands of long-distance riding and racing. In conjunction with the best geometry, we also needed to optimise frame topology and carbon layup.

3D

Argon 18’s proprietary 3D System is an integrated solution that extends the headtube for more positioning options.

Features & Configurations

Max tire size

30c (32mm)

Max rim size

32mm

BB standard

BB86

Hourglass-shaped headtube

Provides aero efficiency with maximum stiffness

Profiled fork legs

Deflect air away from the downtube for maximum aero advantage

Configuration
MSRP
Colorway
Frame
Fork
Seatpost
Headset
BB
(Bottom bracket)
Front derailleur
Rear derailleur
Crankset
See crankset measurements
Cassette
Chain
Wheelset
Tires
Brakes
Rotors
Brake levers
Shifters
Handlebar
See handlebar measurements
Stem
See stem measurements
Bar Tape
Saddle
SRAM Force eTap AXS
$6,200
Podium Grey Gloss
Race Day Red Gloss
SUM
SUM specific
SUM specific
FSA ACR NO.55R 1.5''
SRAM DUB PF 86.5
SRAM Force eTAP AXS
SRAM Force eTAP AXS (MAX 33T)
SRAM Force DUB 48/35
SRAM XG 1270 10-28 XDR
SRAM Force 12S 114L
Hunt 4 Season All-Road Centerlock 12x100/142 XDR
Rubino Pro TLR G+ 700x25c
SRAM Force
SRAM Centerlock Centerline XR / F:160mm R:140mm
SRAM Force eTap AXS
SRAM Force eTap AXS
FSA Energy SCR Compact
FSA ACR ST-OS-160
Ciclovation LEATHER TOUCH Tornado Gloss
Repente Quasar
SRAM Rival eTap AXS
$5,200
Podium Grey Gloss
Race Day Red Gloss
SUM
SUM specific
SUM specific
FSA ACR NO.55R 1.5''
SRAM DUB PF 86.5
SRAM Rival eTAP AXS
SRAM Rival eTAP AXS (MAX 36T)
SRAM Rival DUB 48/35
SRAM Rival AXS XG 1250 10-30
SRAM Rival 12S 114L
Team 30 Clincher Centerlock XDR
Rubino Pro TLR G+ 700x25c
SRAM Rival
SRAM Centerlock Paceline / F:160mm R:140mm
SRAM Rival eTap AXS
SRAM Rival eTap AXS
FSA Energy SCR Compact
FSA ACR ST-OS-160
Ciclovation LEATHER TOUCH Tornado Gloss
Repente Quasar

Geometry

XXS44-46
XS47-50
S51-53
M54-56
L57-59
XL60-62
A
Seat tube Height
cm
39.5
42.5
46.0
50.5
55.0
59.5
B
Seat tube angle
deg
75.0
74.5
74.0
73.5
73.0
72.5
C
Head Tube Angle
deg
71.2
72.1
72.7
72.7
72.7
73.0
D
Top tube length
cm
50.3
52.0
53.8
55.7
57.8
60.0
E
Chain stay length
cm
41.0
41.0
41.0
41.0
41.0
41.0
F
Wheelbase
cm
96.7
97.2
97.5
99.0
100.6
102.0
G
BB Drop
cm
6.9
7.3
7.7
7.7
7.7
7.7
H1
Head Tube Length 3D (0mm)
cm
6.9
8.5
10.1
12.6
15.2
18.0
H2
Head Tube Length 3D (15mm)
cm
8.4
10.0
11.6
14.1
16.7
19.5
H3
Head Tube Length 3D (25mm)
cm
9.4
11.0
12.6
15.1
17.7
20.5
I
Stand Over Height
cm
67.6
70.0
72.7
76.6
80.4
84.1

Fit

(Stack and Reach)

XXS44-46
XS47-50
S51-53
M54-56
L57-59
XL60-62
J
Stack 3D (0mm)
cm
47.1
49.3
51.6
54.0
56.5
59.2
J
Stack 3D (15mm)
cm
48.5
50.7
53.0
55.4
57.9
60.6
J
Stack 3D (25mm)
cm
49.5
51.7
54.0
56.4
58.9
61.6
K
Reach 3D (0mm)
cm
37.5
38.2
38.9
39.7
40.5
41.4
K
Reach 3D (15mm)
cm
37.0
37.7
38.5
39.3
40.1
41.0
K
Reach 3D (25mm)
cm
36.7
37.4
38.2
39.0
39.8
40.7
Saddle Height Min
cm
56.5
59.5
63.0
67.5
72.0
76.5
Saddle Height Max
cm
71.5
74.5
78.0
82.5
87.0
91.5