Bianchi Impulso RC GRX 825 Di2 – High-performance carbon gravel bike with 2x12v electronic gear shifting
The Bianchi Impulso RC GRX 825 Di2 is the gravel bike designed for those who don't want to compromise on speed, control, and versatility . Featuring a high-modulus carbon frame, Shimano GRX Di2 2x12-speed electronic drivetrain, hydraulic disc brakes, and tubeless-ready carbon wheels with ceramic bearings, it's designed to confidently tackle both asphalt and more technical dirt trails.
Perfect for gravel racing, long adventures and anyone looking for a bike capable of high performance with maximum comfort .
Technical Specifications
Frame and Fork
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Frame : IMPULSO RC full carbon
Brakes: 140/160 mm flat mount disc
Bottom bracket: PressFit 86.5 x Ø41
12mm thru axle rear axle – OLD 142mm
Front derailleur: Braze-On
Rear derailleur: SRAM UDH Hang
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Fork : Bianchi Impulso full carbon integrated
140/160 mm flat mount disc brakes
Front axle: 12 mm thru axle – OLD 100 mm
Compatible wheel size: ETRTO 622-42 mm
Headset diameter: 1 1/8"
Headset : Bianchi Custom Acros ICR, with fully integrated cable routing
Transmission – Shimano GRX Di2 2x12v
Shifters : Shimano GRX Di2 ST-RX825
Rear derailleur : Shimano GRX Di2 RD-RX825
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Front derailleur : Shimano GRX Di2 FD-RX825
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Crankset : Shimano GRX FC-RX820, 48/31T
Powermeter 4iiii Precision 3 (single sided)
Cranks: 170 mm (XS–47, SM–51), 172.5 mm (MD–55, LG–58), 175 mm (XL–61)
Bottom bracket : Shimano SM-BB72-41B, PressFit
Chain : Shimano CN-M7100
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Cassette : Shimano CS-HG710, 12-speed, 11-36T
Hydraulic disc brakes
Brakes : Shimano BR-RX820
Discs : Shimano RT-CL800 IceTech, Centerlock, 160 mm front and rear
Wheels and Tires
Handlebar and Stem
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Handlebar bend : Reparto Corse AeroFlare
Flare: 16°, Drop: 120 mm, Reach: 80 mm
Headset diameter: 1 1/8"
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Sizes:
Material: HM-HS carbon fiber composite
Tape : Bianchi Arrow, 2.5 mm thick, black color
Saddle and Seatpost
Please note
Technical specifications are subject to change without notice based on component availability.
Product images are purely indicative and may not exactly reflect the characteristics described.
Bianchi Impulso RC GRX 825 Di2 – The ultimate gravel bike for those seeking racing performance and total freedom on any 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:
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Comfort : Choose the larger size.
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Performance : Go for the smaller size.
Final tips for choosing
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Consult the manufacturer's instructions : Always check the brand's guidelines.
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Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
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Test the bike : If possible, test the model you intend to purchase.
