Whistle AXR RA5.7 Bicycle - Blue/Silver
Whistle AXR RA5.7: 29” e-MTB with Avinox M2 motor and 800 Wh battery
Whistle AXR RA5.7: designed for maximum performance
The Whistle AXR RA5.7 is an electric mountain bike designed to tackle technical trails, challenging descents and off-road routes. The Full Alu aluminum frame with 29-inch wheels, combined with 160 mm rear travel and RockShox suspension, offers a configuration designed to handle uneven terrain and demanding trails.
The Avinox electric assistance system integrates the M2 motor and an 800 Wh battery, with a stated maximum torque of 150 Nm and a maximum power of 1300 W. The 12-speed Shimano XT transmission, four-piston Shimano BR-MT520 brakes and 29” x 2.60” Schwalbe Nobby Nic tires complete the equipment of this e-MTB.
Main features
- Frame: Full Alu 29” with integrated battery and 160 mm rear travel.
- Motor: Avinox M2, weight 2.6 kg.
- Battery: Avinox 800 Wh, integrated and fixed, weight 3.74 kg.
- Maximum power: 1300 W.
- Maximum torque: 150 Nm.
- Rated power: 250 W.
- Fork: RockShox Psylo Silver RC eMTB Solo Air, 160 mm travel.
- Shock: RockShox Deluxe Debon Air, 230 x 65 mm.
- Transmission: Shimano XT RD-M8200 SGS Shadow Plus 12-speed.
- Brakes: Shimano BR-MT520 four-piston, with 203 mm Shimano SM-RT66 rotors.
- Wheels: 29” with Radiale W30 eDesign Tubeless Ready rims.
- Tires: Schwalbe Nobby Nic Performance Addix 29” x 2.60”.
- Display: Avinox DP100.
- Weight: 25.8 kg.
Technical specifications
Aluminum frame and 160 mm RockShox suspension
The Whistle AXR RA5.7 Full Alu frame is designed for 29-inch wheels and integrates the battery into the frame. The construction includes a tapered head tube, internal cable routing, a 12 x 148 mm E-Thru rear standard and a UDH derailleur hanger.
The 160 mm rear travel is paired with a RockShox Psylo Silver RC eMTB fork and a RockShox Deluxe Debon Air shock, a configuration designed to tackle technical trails and uneven terrain.
RockShox Psylo Silver RC eMTB fork
The RockShox Psylo Silver RC eMTB fork features a Solo Air air system and offers 160 mm of travel. It is designed for 29-inch wheels and features a 1.5” tapered steerer tube and a 15 x 110 mm thru-axle.
RockShox Deluxe Debon Air shock
The RockShox Deluxe rear shock with Debon Air technology measures 230 x 65 mm and is paired with the frame with 160 mm rear travel.
Avinox M2 motor and 800 Wh integrated battery
The Whistle AXR RA5.7 is equipped with the Avinox M2 electric motor, with a declared weight of 2.6 kg, paired with an Avinox 800 Wh battery with a fixed and frame-integrated configuration, weighing 3.74 kg.
The system declares a maximum power of 1300 W, a maximum torque of 150 Nm and a rated power of 250 W. The electric assistance supports pedaling on different types of routes, up to the declared maximum assisted speed of 25 km/h.
The Avinox DP100 display allows you to view information related to the electric system.
Assistance modes
- Auto: adapts the assistance to the conditions of use.
- Eco: prioritizes consumption containment.
- Trail: designed for riding on off-road routes.
- Turbo: offers a high level of assistance.
- Boost: supplementary assistance mode.
12-speed Shimano XT drivetrain
The Whistle AXR RA5.7 drivetrain combines the 12-speed Shimano XT RD-M8200 SGS Shadow Plus rear derailleur with Shimano Deore SL-M6200 Rapidfire-Plus controls.
The Shimano CS-M6200 cassette with a 10-51-tooth range offers a wide range of gears for tackling climbs and technical sections. The 165 mm FSA CK745 crankset is equipped with a 36-tooth MegaTooth chainring.
Four-piston Shimano BR-MT520 brakes
The Whistle AXR RA5.7 features four-piston Shimano BR-MT520 brakes, paired with 203 mm Shimano SM-RT66 rotors at both front and rear.
The 203 mm rotor configuration on both wheels is designed to provide effective braking and good control when riding more demanding trails.
29” wheels and Schwalbe Nobby Nic tires
The 29-inch wheels feature Radiale W30 eDesign Tubeless Ready rims, measuring 622 x 30c.
The front Radiale J110 hub uses the 15 x 110 mm standard, while the Radiale J148 rear hub uses the 12 x 148 mm standard and features a Microspline system. Both hubs have an International configuration and 32 holes.
The 29” x 2.60” Schwalbe Nobby Nic Performance Addix tires complete the setup, with a configuration suitable for off-road riding.
Components and equipment
- Headset: FSA CRII Dual, 1.5”, with internal cable routing.
- Stem: aluminum, 35 mm clamp diameter; 35 mm extension for frame sizes S-M and 50 mm for sizes L-XL.
- Handlebar: aluminum, 780 mm wide, 35 mm clamp diameter and 15 mm rise.
- Seatpost: Dropper A1, 31.6 mm diameter, with remote control.
- Saddle: Selle Royal SRX or Selle San Marco Zero.
- Pedals: Alu MTB Full +.
Please Note
Technical specifications are subject to change without notice depending on component availability.
Product images are for illustrative purposes only and may not perfectly reflect the described features.
Choose the Whistle AXR RA5.7 and prepare to enjoy every trail with power, control and high performance, tackling even the most demanding trails with maximum safety.
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.
- - Returned within 14 days
- - Secure payments
- - Price valid only for online purchase
