Bianchi Arcadex PRO GRX 820/822 1x12sp – High Performance Gravel Bike
Master every gravel path with style, precision, and power
The Bianchi Arcadex PRO GRX 820/822 disc 1x12sp is the gravel bike designed for those seeking high performance, distinctive design, and cutting-edge technologies. The carbon frame, Shimano GRX 12-speed transmission, and tubeless-ready setup make it perfect for tackling long adventures on dirt and asphalt. Available in the iconic Celeste Bianchi color, it combines tradition and innovation to offer you a riding experience without compromises.
Technical Specifications
Frame & Fork
Frame: Bianchi Arcadex PRO frame kit. Standard disc brake: Flat Mount 140/160 mm. Bottom bracket: PressFit 86.5 x Ø41. Rear axle: thru-axle 12 OLD (142 mm). Front derailleur compatibility: not supported. Rear derailleur compatibility: SRAM UDH type
Fork: Bianchi Arcadex Carbon. Disc brake: Flat Mount 140/160 mm. Front axle: thru-axle 12 OLD (100 mm). Tire clearance: ETRTO 622-50 mm. Head tube diameter: 1 1/8". Material: SM Carbon
Steering series: Bianchi Custom Acros ICR with fully integrated cable routing
Shimano GRX 820/822 Transmission – 1x12 Speed
Commands: Shimano GRX 820 ST/BL-RX820
Rear derailleur: Shimano GRX 822 RD-RX822 SGS. Cassette compatible up to 51T
Crankset: Shimano GRX 820 FC-RX820-1, 40T. Crank arm lengths: 170 mm – XS (47), SM (51), 172.5 mm – MD (55), LG (58), 175 mm – XL (61)
Bottom bracket: Shimano SM-BB72-41B, Press Fit
Chain: Shimano CN-M7100
Cassette: Shimano CS-M7100, 12 speed, 11-51T. Driver body interface: MicroSpline
Braking System
Wheels & Tires
Wheels: Velomann Terbium. Compatible with clincher and tubeless ready. Rim material: carbon. Diameter: 700C. Rim height: 30 mm. Internal channel: 25 mm
Tires: Pirelli Cinturato™ Gravel M Classic. Size: 45-622. Tan sidewall for a vintage and bold look
Cockpit & Control Components
Handlebar stem: Velomann aluminum AICR. Rise: -2°. Steering diameter: 1-1/8" (28.6 mm). Bend clamp diameter: 1-1/4" (31.8 mm). Lengths by size: 80 mm – XS (47), 90 mm – SM (51), 100 mm – MD (55), 110 mm – LG (58), 120 mm – XL (61)
Handlebar bend: Velomann Gravel ICR aluminum. Flare: 16°. Drop: 130 mm. Reach: 70 mm. Diameter: 31.8 mm. Widths: 400 mm – XS (47), SM (51). 420 mm – MD (55), LG (58). 440 mm – XL (61)
Handlebar tape: Bianchi Hexagon. Thickness: 2.5 mm. Color: solid black
Saddle & Seatpost
Seatpost: Velomann Carbon UD. Diameter: Ø27.2 mm. Lengths: 300 mm – XS (47), 350 mm – SM (51), MD (55), LG (58), XL (61).
Saddle: Velomann MITORA 149 H1. Technical cover with foam padding. Reinforced carbon fiber shell with central hole. Rails in AISI steel. Length: 250 mm. Width: 149 mm. Weight: 230 g ± 2
Please note
Technical specifications may change without notice based on component availability.
The product images are for illustrative purposes only and may not exactly reflect the described features.
With the Bianchi Arcadex PRO GRX 820/822, every ride becomes an experience of control, speed, and freedom. Ideal for gravel and for the most demanding cyclists, it is the perfect choice for those who are not satisfied and want to always pedal at their best, on every terrain.
Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly
A Complete Guide to Bike Sizes
Foreword: Not all bike sizes are the same
Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.
Bicycle adjustment margins
Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.
How to use size charts
We've created a simple guide to help you find the right bike size:
- Check out our size charts for each bike type.
- Learn more with specific tips to help you make the right choice.
Size Charts: Find Your Perfect Bike
Gravel and road bikes
Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.
| Cut
|
Recommended height
|
Horizontal tube length
|
| XS |
Up to 157 cm |
48-50 cm |
| S |
157-167 cm |
50-53 cm |
| M |
168-178 cm |
53-56 cm |
| THE |
178-185 cm |
56-58 cm |
| XL |
Over 185cm |
58-62 cm |
For gravel, measurements may vary slightly due to different geometries, but remain similar.
Mountain bike
MTBs are measured in inches, based on the seat tube.
| Cut
|
Recommended height
|
Size (in inches)
|
| XS |
Up to 157 cm |
14"-16" |
| S |
157-167 cm |
15"-17" |
| M |
168-178 cm |
16"-19" |
| THE |
178-185 cm |
18"-20" |
| XL |
Over 185cm |
20"-23" |
Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .
Children's bikes
The size depends on the size of the wheels, often associated with age:
| Age
|
Wheel Size
|
| 1-3 years |
12" |
| 2-4 years |
14" |
| 4-6 years |
16" |
| 5-8 years |
20" |
| 8-10 years |
24" |
| Over 10 years |
26"/27.5" |
What to do with half measures?
If you are between two sizes:
-
Comfort : Choose the larger size.
-
Performance : Go for the smaller size.
Final tips for choosing
-
Consult the manufacturer's instructions : Always check the brand's guidelines.
-
Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
-
Test the bike : If possible, test the model you intend to purchase.
