Expert Advice
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. Find out more
Final Few
Final Few
Product Details
Argon 18 Equation 105 Road Bike
Built for riders who want to go further and faster without sacrificing ride quality, the Equation 105 Road Bike is Argon 18’s formula for pure road riding enjoyment.
Comfort-Focused Carbon Performance for Longer Rides
At the heart of the Argon 18 Equation 105 Road Bike is a performance-minded carbon frame engineered for real-world riding. Using Argon 18’s proprietary design method and TCS (Topological Compliance System) technology, each frame is individually analysed to optimise carbon layup and frame topology. The result is exceptional vertical compliance that smooths out road buzz and dampens vibrations, while maintaining the stiffness you need for efficient power transfer. It’s the ideal carbon road bike for endurance rides, sportives and fast weekend miles.
Stable, Intuitive Handling with Proven Shimano 105 Reliability
Designed around Argon 18’s endurance geometry, the Equation delivers a stable, confidence-inspiring ride with a slightly more relaxed rider position – perfect for comfort over long distances, without losing the brand’s performance DNA. Borrowing carbon layup concepts from Argon 18’s Pro-level bikes, this cyclosportif-focused model offers sharp, intuitive handling and refined ride quality. Paired with the ever-reliable Shimano 105 groupset, you get crisp shifting, dependable braking and outstanding value, making the Argon 18 Equation Shimano 105 Road Bike a smart choice for performance-focused cyclists who demand more from every ride.
Specs
- Crank Lengths: XXS-165mm; XS and S-170mm; M and L-172.5mm; XL-175mm
- Bar Widths (cente to centre): XXS, XS, S-40cm; M, L, XL- 42cm
- Stem Lengths: XXS-70mm; XS-80mm; S-90mm; M-100mm; L, XL-110mm
Features
- Headset: FSA NO.69 SRS System
- Integrated Cables: Yes
- Wheels: DT Swiss E1800
- Tires: Vittoria Zaffiro Pro 700x30c
- Bottom Bracket: Shimano BB-RS500-PB
- Front Derailleur: Shimano 105 R7100
- Rear Derailleur: Shimano 105 R7100
- Crankset: Shimano R7100 50/34
- Chain: Shimano 105 CN-M7100
- Cassette: Shimano 105 CS-R7100 11-34
- Brakes: Shimano 105 R7120 Shifter/Caliper Set
- Rotors: Shimano SM-RT86, 6-bolt / F:160mm R:160mm
- Handlebar Width: FSA Vero Compact
- Stem Length: FSA OS-167 Omega Pro
- Bar Tape: Prologo Plaintouch black
- Saddle: Prologo Akero
- Seatpost: FSA Gossamer SB20 27.2mm
Highlights
-
-
-
Specifications
- Model
- Equation 105
- Bottom Bracket [Maker]
- Shimano
- Bottom Bracket Standard
- BB86/BB92
- Brakes [Kind]
- Hydraulic Disc
- Brakes [Maker]
- Shimano
- Brakes [Model]
- 105
- Cassette [Gearing]
- 11-34
- Cassette [Maker]
- Shimano
- Cassette [Model]
- 105
- Chain [Maker]
- Shimano
- Chain [Model]
- 105
- Chainring [Gearing]
- 50/34
- Crank [Maker]
- Shimano
- Crank [Model]
- 105
- Discipline Compatibility
- Road
- E-Bike
- No
- Family
- Equation
- FD [Maker]
- Shimano
- FD [Model]
- 105
- Fenders Mounts
- No
- Fork [Axle Diameter]
- 12 mm
- Fork [Axle Type]
- Thru-Axle
- Fork [Brake Type]
- Disc
- Fork [Material]
- Carbon
- Fork [Wheel Size]
- 700c
- Frame [Hanger Standard]
- UDH
- Frame [Material]
- Carbon
- Frame [Tire Clearance]
- 32c mm
- Frameset
- No
- Gearing [Configuration]
- 2x
- Gearing [Kind]
- Conventional
- Gender
- Unisex
- Handlebar [Kind]
- Drop
- Handlebar [Maker]
- FSA
- Handlebar [Shape]
- Compact Drop
- Handlebar [Width]
- 400 mm
- Headset [Maker]
- FSA
- Rack Mounts
- No
- RD [Maker]
- Shimano
- RD [Model]
- 105
- Saddle [Maker]
- Prologo
- Seatpost [Diameter]
- 27.2
- Seatpost [Kind]
- Rigid
- Seatpost [Maker]
- FSA
- Seatpost [Material]
- Aluminium
- Seatpost [Offset]
- 20 mm
- Shifters [Maker]
- Shimano
- Shifters [Model]
- 105
- Shifting
- Mechanical
- Stem [Clamp Diameter]
- 31.8
- Stem [Length]
- 90 mm
- Stem [Maker]
- FSA
- Sub Family
- Equation
- Suspension Configuration
- Rigid
- Tires [Maker]
- Vittoria
- Tires [Width]
- 30 mm
- Wheels [Configuration]
- Front+Rear
- Wheels [Kinds]
- Tubeless Ready
- Wheelset [Maker]
- DT Swiss
- Wheelset [Material]
- Aluminium
- Wheelset [Model]
- E 1800
- Product code
- 2005897 / 54293377810778
Size Guide
| Size | XXS (44-46) | XS (47-50) | S (51-53) | M (54-56) | L (57-59) | XL (60-62) |
|---|---|---|---|---|---|---|
| Stack | 51.8 | 53.7 | 55.8 | 57.8 | 60.0 | 62.3 |
| Stack 3D (25mm) | 54.1 | 56.1 | 58.1 | 60.2 | 62.3 | 64.6 |
| Reach S | 35.1 | 36.1 | 37.2 | 38.1 | 39.0 | 40.0 |
| Reach 3D (25mm) | 35.9 | 36.9 | 37.9 | 38.8 | 39.7 | 40.7 |
| Seat Tube Height | 42.0 | 45.0 | 48.5 | 52.0 | 55.5 | 59.0 |
| Seat Tube Angle | 75.5 | 74.9 | 74.3 | 73.7 | 73.1 | 72.5 |
| Head Tube Length 3D (0mm) | 70.3 | 71.3 | 72.0 | 72.0 | 72.0 | 72.5 |
| Top Tube Length | 49.6 | 51.6 | 53.7 | 55.8 | 58.0 | 60.4 |
| Chain Stay Length | 41.7 | 41.7 | 42.0 | 42.0 | 42.0 | 42.0 |
| Wheelbase | 98.1 | 98.9 | 99.7 | 101.3 | 103.0 | 104.3 |
| BB Drop | 8.0 | 8.0 | 7.8 | 7.8 | 7.5 | 7.5 |
| Stand Over Height | 67.3 | 70.0 | 73.4 | 76.4 | 79.7 | 82.7 |
| Fork Length (Axle-to-crown) | 38.7 | 38.7 | 38.7 | 38.7 | 38.7 | 38.7 |
| Fork Rake | 5.2 | 5.2 | 4.7 | 4.7 | 4.7 | 4.7 |
| Trail | 6.8 | 6.1 | 6.2 | 6.2 | 6.2 | 5.9 |
Reviews
No reviews yet. Be the first to review this product.
Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
Be the first to ask a question about this product.
Why buy your bike from Sigma Sports?
Cycle to Work Schemes
Save up to 42% with Cycle to Work, and get the health benefits of a new bike in exchange for tax free salary sacrifice. Find out more
Bike Delivery Options
Choose between Free Bike Delivery, or our Premier Bike Delivery Service & have your bike delivered "ready to ride". Find out more
Laka Insurance
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Find out more