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Argon 18 Dark Matter Gravel Bike - 2026, Small

Item #BGR16737
Condition: Certified Pre-Owned
Fit Range: 5'2" - 5'5"

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Every Certified Pre-Owned bike passes our multi-point inspection
  • Frame integrity verified
  • All components inspected
  • Drivetrain cleaned and tuned
  • Suspension adjusted
  • Wheels trued
Shipping

Our RideFast shipping means this bike gets to you quickly and securely.

Quick Assembly
  • Bikes arrive tuned and mostly pre-assembled
  • Video guide included
  • Get riding in 15 minutes
Canadian Customers

Please note that any duties, taxes, or surcharges as required by Canadian customs and provincial authorities will be the buyer's responsibility. Shipping to Canadian addresses may take longer than expected due to customs.

30-Day Returns

If this bike isn't perfect for you, our Ride Guides will help you find the right one.

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Make Your Gravel Podium Dreams a Reality

Why We Love It
For the discerning racer looking to take their speed off-road. The Argon 18 Dark Matter is designed with a heavy dose of road performance carefully merged with gravel-tuned geometry and wider tire clearance. To accomplish the needed vertical compliance that gravel demands, Argon 18 developed their "Topological Compliance System". Much of this system is achieved by intentionally designed flex in the seatstays, which allows the seat tube to flex below the rider providing the desired vertical compliance without sacrificing lateral stiffness. For the most demanding gravel, The Dark Matter can clear up to a 45mm tire (whether 700c or 650b). Make your gravel podium dreams a reality with the Dark Matter.
Master Mechanic’s Notes
  • New handlebar tape
  • Light scratches on the top tube
  • Please Note: Power meters are typically aftermarket upgrades, and we cannot guarantee functionality, battery life, accuracy, or calibration. Due to this, power meters are no longer factored into the pricing of our CPO bikes. Charge cables and/or spare batteries not included. In some cases, activation fees may apply.
Specifications
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Details
Original MSRP $6,500.00
Year 2026
Brand Argon 18
Model Dark Matter
Size Small
Frame Material Carbon Fiber
Drivetrain SRAM, 1x12 spd
Weight 19 lbs 3 oz
Build
Fork Argon 18 Dark Matter, Carbon
Brakes SRAM Force AXS E1, Disc Brakes - Hydraulic
Shifters SRAM Force AXS E1, Electronic
Rear Derailleur SRAM X01 Eagle AXS
Bottom Bracket Shell Press fit
Crankset SRAM Force AXS Carbon, 40t, 167.5mm
Cassette SRAM XG-1275 Eagle, 10-50t
Chain SRAM
Handlebar FSA K-Wing AGX Carbon, 42cm
Headset FSA
Stem FSA SMR-II Alloy, 31.8mm x 80mm, 6°
Seatpost Deda Carbon, 27.2mm
Saddle Specialized Romin EVO Hollow w/ Cr-Mo Rails
Front Axle Spacing 12x100mm (Thru-Axle)
Rear Axle Spacing 12x142mm (Thru-Axle)
Wheelset Reynolds Blacklabel G700 Pro Carbon Tubeless Compatible, Reynolds Industry Nine
Front Tire Schwalbe Tunder Burt, 700C x 2.25"
Rear Tire Schwalbe Tunder Burt, 700C x 2.25"
Tire Type Tubeless
Tubeless Compatibility Bike ships tubeless
Charger Included yes
Pedals Sold separately
Geometry
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Bike geometry chart
Inspected. Tested. Trusted.

What is CPO?

CPO bikes are gently ridden bikes that have been meticulously inspected, restored and serviced. Every CPO bike is cleaned, tuned and tested in our top-of-the-line Colorado headquarters. Road, mountain, ebike or gravel, TPC services each bike over 8 phases and multiple points of inspection.

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Bikes are meant
to be used.