Shop now, pay later - flexible payment options available!

Take a look at the RA Cycles Top Road Bikes for 2025

Argon 18 Equation 105 Bike


$2,70000

Color 1
Size

Coming soon! Backorder this item and one of our sales associates will contact you within 24 hours confirming its shipping date.

Argon 18  |  SKU: EQU.XXS.375B.3.1 | Option: Podium Champagne, XXS

Questions about this product?

What size do I need?

Get a digital fit assessment

Schedule a Bike Fit in Walnut Creek, CA.

Schedule a Bike Fit in Brooklyn, NY. Please call 718-636-5242


* Product image may vary. Refer to the description for accurate details.

Argon 18 Equation 105 Bike Info

The Argon 18 Equation is an endurance road bike that gives riders a great price and great performance on a carbon framed machine. Built with Argon 18’s proven Topological Compliance System (TCS), the Equation optimizes vertical compliance while dampening road vibrations, ensuring a smooth and comfortable ride without sacrificing stiffness. The frame’s Cyclosportif carbon layup is adapted from Argon 18’s pro-level models, providing the performance-oriented handling and durability needed for longer rides. Its endurance geometry keeps the rider in a relaxed yet efficient position for long term speed. The Argon 18 Equation is ideal for everything from fast group rides to long solo adventures.

Argon 18’s 3D System allows for a customizable fit without compromising stiffness or safety. The proprietary design offers a range of fit options for different rider sizes, ensuring every cyclist finds their ideal position on the bike. With size-specific geometries thanks to the Argon Fit System, the Equation accommodates all riders, maintaining optimal performance across all frame sizes. It also allows for fender mounting and up to 32mm tires for adventurous riders. This version is equipped with a Shimano 105 groupset for efficient mechanical 12-speed shifting at a great price.

The Equation’s full carbon frame is lightweight, compliant, and UCI-legal while still providing the comfort needed for long endurance rides. The semi-integrated cables create a sleek cockpit and simplify maintenance, while the 27.2mm seatpost and reliable seat clamp system ensure hassle-free adjustments. With Argon 18’s focus on engineered quality and proven performance, the Equation is built for those who want well-rounded performance at a great price. The Argon 18 Equation is the kind of bike you take out everyday for a great ride.

Argon 18 Equation 105 Bike Specifications

Frame Material:
Carbon
Fork:
Carbon
Headset:
FSA NO.69 SRS System
Seatpost:
FSA Gossamer SB20 27.2mm
Front Derailleur:
Shimano 105 R7100
Rear Derailleur:
Shimano 105 R7100
Crankset:
Shimano 105 R7100
Chainrings:
50/34
Bottom Bracket:
Shimano BB-RS500-PB
Brake Calipers:
Shimano 105 R7120 Hydraulic Disc
Rotors:
Shimano SM-RT86 / 6-bolt / 160mm
Shifters / Levers:
Shimano 105 R7120
Cassette:
Shimano 105 R7100 12-speed 11-34
Chain:
Shimano M7100 12-speed
Wheel - Front:
Vision Team 30 TC
Wheel - Rear:
Vision Team 30 TC
Stem:
FSA OS-167 Omega Pro
Handlebar:
FSA Vero Compact
Saddle:
Prologo Akero
Tires:
Vittoria Zaffiro Pro 700x30
Bar Tape:
Prologo Plaintouch
Pedals:
Not Included

*Specifications are subject to change.

Argon 18 Equation 105 Bike Geometry

Argon 18 Equation 105 Bike Geometry
Size:
XXS
M
L
XL
B. Seat Tube (c-t)
420
520
555
590
C. Top Tube Length
496
558
580
604
D. Head Tube Length
84-109
141-166
166-191
189-214
E. Chain Stay Length
417
420
420
420
F. BB Drop
80
78
75
75
G. Seat Tube Angle
75.5
73.7
73.1
72.5
H. Head Tube Angle
70.3
72
72
72.5
I. Stand Over Height
673
76.4
797
827
J. Wheel Size
700c
700c
700c
700c
K. Stack
518-541
578-602
600-623
623-646
L. Reach
351-359
381-388
390-397
400-407
Stem Length
70
100
110
110
Bar Width
40
42
42
42
M. Crank Length
165
172.5
172.5
175

The RA Black Experience - Transforming How You Buy a Bike

Buying a bike isn't like grabbing a gadget or a t-shirt. It's a deeply personal journey filled with emotion, expertise, and passion. The overwhelming amount of online information can leave you more confused than confident. Why spend endless hours wading through misleading or biased advice? At RA Cycles, we take the guesswork out of your decision with RA Black, our elite cycling experts who guide you to the perfect bike—no matter where it comes from.

The R&A Transporter Bike Box

Shipping bikes can be tricky. They are big and bulky but delicate. Shipping your passion / investment is nothing we take lightly. We go through great detail to ensure your new ride will get to you in perfect condition.

So you've purchased the bike of your dreams! We've put together this video to outline the R&A concept of shipping bikes and the steps we take to get you your new bike in perfect condition. It will show you the careful steps we take to assemble your bike to make it as easy as possible for you to get your bike on the road when you receive it. Ready to ride. It will also show you the tips and tricks of removing all of your parts in the most careful way to ensure your riding as quickly as possible.

PRICE MATCH GUARANTEE

We will price match against advertised or quoted prices from other authorized dealers of the product!

ARGON-18-EQUATION-105-ASPHALT-GREY.jpg
Argon 18

Argon 18 Equation 105 Bike

$2,70000

The Argon 18 Equation is an endurance road bike that gives riders a great price and great performance on a carbon framed machine. Built with Argon 18’s proven Topological Compliance System (TCS), the Equation optimizes vertical compliance while dampening road vibrations, ensuring a smooth and comfortable ride without sacrificing stiffness. The frame’s Cyclosportif carbon layup is adapted from Argon 18’s pro-level models, providing the performance-oriented handling and durability needed for longer rides. Its endurance geometry keeps the rider in a relaxed yet efficient position for long term speed. The Argon 18 Equation is ideal for everything from fast group rides to long solo adventures.

Argon 18’s 3D System allows for a customizable fit without compromising stiffness or safety. The proprietary design offers a range of fit options for different rider sizes, ensuring every cyclist finds their ideal position on the bike. With size-specific geometries thanks to the Argon Fit System, the Equation accommodates all riders, maintaining optimal performance across all frame sizes. It also allows for fender mounting and up to 32mm tires for adventurous riders. This version is equipped with a Shimano 105 groupset for efficient mechanical 12-speed shifting at a great price.

The Equation’s full carbon frame is lightweight, compliant, and UCI-legal while still providing the comfort needed for long endurance rides. The semi-integrated cables create a sleek cockpit and simplify maintenance, while the 27.2mm seatpost and reliable seat clamp system ensure hassle-free adjustments. With Argon 18’s focus on engineered quality and proven performance, the Equation is built for those who want well-rounded performance at a great price. The Argon 18 Equation is the kind of bike you take out everyday for a great ride.

Color 1

Size

  • XXS
  • XS
  • S
  • M
  • L
  • XL
View product