Dark Matter

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Go way off the beaten path with this gravel racer featuring true road race-inspired geometry derived from Argon 18’s legendary race bikes. Some will blaze the trail, but on the Dark Matter, you will scorch it.

Color: Dawn Blue Dark Red

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.

Where the pavement ends

For when the route is unpredictable – but the ride must be solid. Head way off the beaten path with this gravel racer featuring performance-driven geometry derived from Argon 18’s legendary World Tour bikes. Go wherever the day takes you with assured handling and optimal power transfer, to control the terrain regardless of the surprises it may throw at you. We wanted a bike that offered supreme confidence alongside racing behaviour, a bike that would feel just as playful and responsive on the dirt as it would on the road.

Our gravel geometry provides fork rake specific to frame size, to allow for tight turn clearance on more technical runs, and with an eye toward ride quality, the Dark Matter features seatstays designed to flex and dissipate shocks. You'll also get three head tube extension heights for every frame size with our streamlined 3D+ system: 0mm, 15mm and 30mm.

Ideal for

Gravel racers looking for poppy performance and nimble responsiveness on all terrain.

Core Technologies

3D+

For our newest generation of bikes, we wanted to push our 3D System even further by merging it seamlessly with the frame.

Modular Cable Console

Di2 and wireless optimized, compatible with mechanical and EPS groupsets.

Gravel Geometry

Our gravel geometry draws on our endurance geometry, itself directly inspired by our performance road race series, meaning handling, responsiveness and race-ready positioning are paramount.

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.

Argon Fit System

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

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.

Features & Configurations

Max tire size

45c (for both 700C and 650B)

Max rim size

48mm

BB standard

BB86

Removable Front Derailleur Hanger

For clean installation of 1x, compatible with 46/30T to 52/36T or 1x46T

Flat Mount Disc Brakes (140/160 Rotors)

Powerful braking for riding confidence in all conditions. When using fenders, 140mm rear rotor is recommended

Optional Direct Mount Rear Derailleur Hanger

For added versatility and optimal installation

12mm DT-Swiss Type Thru-Axle

Fast wheel changes, light and sturdy axles. 100mm front and 142mm rear

Inlaid Chainsuck Protector

Protects the carbon chainstay against wear from the chain's movement and features integrated drainage

Downtube Protector with Bottle Mount

Provides access to internal cable routing

45C (48mm) Tire Clearance

40C (43mm) with fenders. Limitations may apply with specific groupsets

27.2mm Carbon Seatpost

Offers adjustable offset for optimal fit, compliance, and comfort in all riding conditions

Configuration
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
Frameset
Hyper-Silver Coal Black
Dawn Blue Dark Red
Dark Matter
Dark Matter specific
Argon 18 TDS-C Carbon, 27.2mm (included with frameset)
FSA NO.30/Kit + 3D+ w/ TH881-1

Geometry

XXS44-46
XS47-50
S51-53
M54-56
L57-59
XL60-62
A
Seat tube Height
cm
42.0
45.0
48.5
52.0
55.5
59.0
B
Seat tube angle
deg
75.5
74.9
74.3
73.7
73.1
72.5
C
Head Tube Angle
deg
69.5
71.0
71.4
72.0
72.0
72.5
D
Top tube length
cm
49.2
51.3
53.4
55.6
57.9
60.3
E
Chain stay length
cm
42.8
42.8
42.8
42.8
42.8
42.8
F
Wheelbase
cm
100.8
101.1
102.4
103.0
104.6
105.9
G
BB Drop
cm
7.0
7.0
7.0
7.0
7.0
7.0
H1
Head Tube Length 3D+ (0mm)
cm
12.0
13.5
15.4
17.1
19.2
21.6
H2
Head Tube Length 3D+ (15mm)
cm
13.5
15.0
16.9
18.6
20.7
23.1
H3
Head Tube Length 3D+ (30mm)
cm
15.0
16.5
18.4
20.1
22.2
24.6
I
Stand Over Height
cm
70.1
72.9
76.0
79.1
82.1
85.2

Fit

(Stack and Reach)

XXS44-46
XS47-50
S51-53
M54-56
L57-59
XL60-62
J
Stack 3D+ (0mm)
cm
53.0
55.0
57.0
59.0
61.0
63.5
J
Stack 3D+ (15mm)
cm
54.4
56.4
58.4
60.4
62.4
64.9
J
Stack 3D+ (30mm)
cm
55.8
57.8
59.8
61.9
63.9
66.4
K
Reach 3D+ (0mm)
cm
35.6
36.7
37.7
38.7
39.7
40.7
K
Reach 3D+ (15mm)
cm
35.1
36.2
37.2
38.2
39.2
40.2
K
Reach 3D+ (30mm)
cm
34.6
35.7
36.7
37.8
38.8
39.8
Saddle Height Min
cm
52.0
55.0
58.5
62.0
65.5
69.0
Saddle Height Max
cm
74.0
77.0
80.5
84.0
87.5
91.0
Standover Height is measured with 700x40c tires

Reviews

Add your review

An incredible gravel bike

By Jean-Francois Houpert from CA, Quebec
Aug 27, 2021
I signed up for a 500km ride over three days and this was one of the most comfortable bikes I ever ridden. I came from a Specialized Diverge and the Dark Matter is a huge step up in comfort and performance. This bike keeps on impressing me.

Great gravel bike!

By Travis Brooks from US, Missouri
Aug 11, 2021
Coming from ridding a Crux for my gravel rides I couldn't believe how much more comfortable the Dark Matter is. I love ridding this bike on the road and on gravel it was the prefect bike for the Unbound 100 and I am sure it will be better on the 200.

Impressionnant

By Sebastien Girard from CA, Québec
Aug 13, 2020
Vous recherchez un vélo qui fait tout: le Voilà!!! Beaucoup de craquement par contre au niveau du pédalier(je vais devoir le ramener pour une 2ième fois 450km au compteur) bruit de cable interne. Tenu de route incroyable même à plus de 50km/h sur de la gravel!!! Bref l'un des meilleurs vélos que j'ai eu