Whistle B-Rush C10.5 Bicycle – Full Carbon 29” eMTB with Bosch motor and RockShox suspension
Maximum performance for electric trail and enduro
The Whistle B-Rush C10.5 bicycle is a high-end full suspended e-MTB, designed to offer high performance on any type of terrain. Equipped with a 29” Toray T700 carbon frame, latest generation Bosch motor, and a 170 mm front suspension, this bike is built to tackle the most technical descents and the toughest climbs without compromise.
Thanks to premium components, including RockShox suspension, Shimano XT 12v derailleur, and 4-piston brakes, the B-Rush C10.5 is ideal for those looking for a powerful, precise, and reliable e-bike, ready for anything.
Technical features – Mechanical components
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Frame: Full carbon Toray T700, 29” wheels, integrated battery, tapered head tube, internal cable routing
Front fork: RockShox ZEB eMTB, Debon Air+, travel 170 mm, 1.5” tapered, axle 15x110 mm
Rear shock: RockShox Super Deluxe, Debon Air Progressive, size 230x65 mm
Headset: Acros for Ursa, 1.5”, with internal cable routing
Crankset: FSA CK320, 34 teeth, MegaTooth
Rear derailleur: Shimano XT RD-M8100 SGS Shadow Plus, 12 speed
Shifters: Shimano SLX SL-M7100 Rapidfire-Plus, 12 speed
Cassette: Shimano CS-M6100, 12 speed, 10-51 range
Brakes: Shimano XT BR-M8120 4-piston, with RT-MT800 203 mm rotors (front and rear)
Pedals: MTB Full+ Aluminum
Stem: RaceFace Turbine-R, diameter 35 mm, length 40 mm
Handlebar: Race Affect-R, width 780 mm, diameter 35 mm, rise 20 mm
Seatpost: Dropper post A1, diameter 31.6 mm, remote control
Saddle: Selle Royal SRX
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Tires:
Front: Schwalbe Magic Mary Evo, Addix Soft, Super Trail, TLE, 29x2.60”
Rear: Schwalbe Big Betty Evo, Addix Soft, Super Trail, 29x2.60”
Overall weight: 24.2 kg
Electrical specifications – Motor, battery, and display
Battery: Bosch 800 Wh
Display: Bosch Purion 200
Charger: 4 A (full charge in about 6.9 hours)
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Pedal assistance:
Eco: 60%
Tour+: from 60% to 340%
EMTB+: from 140% to 400%
Turbo: 400%
Maximum assisted speed: 25 km/h
Why choose the Whistle B-Rush C10.5
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Lightweight and durable full carbon frame, designed for electric enduro
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Bosch motor with 800 Wh battery, ideal for long rides and significant elevation gains
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RockShox suspensions of 170 mm/160 mm for total control on the most technical terrains
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Shimano XT 12-speed drivetrain for smooth and reliable shifting even under strain
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4-piston brakes and Schwalbe EVO tires for maximum safety and grip
Ideal for:
Electric enduro and technical trail
Alpine excursions and steep descents
Experienced riders seeking top performance and high autonomy
Note Well
Technical specifications may change without notice depending on component availability.
Product images are for illustrative purposes only and may not exactly reflect the described features.
The Whistle B-Rush C10.5 is one of the most complete e-MTBs in its category: built for those who accept no compromises, with premium components and electric power that takes you anywhere.
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.
