Specialized Turbo Tero 4.0 Bicycle – Adventure, City, and Off-Road E-Bike
Tackle any terrain without limits with the Turbo Tero 4.0, the versatile electric bike designed for those seeking reliable performance, extended range, and maximum maneuverability. From asphalt to the most technical trails, it is the ideal e-bike for daily commuting, bike touring, and off-road explorations.
With a unique combination of power, comfort, and safety, the Turbo Tero 4.0 is ready to become your ultimate adventure companion. Discover what this advanced trekking e-bike can do.
Natural and Silent Power with Turbo Full Power 2.0 Motor
At the heart of the Tero 4.0 is the Specialized 2.0 motor with 250W nominal power and 70Nm torque, which quadruples pedal effort smoothly, silently, and intuitively. Powered by a Specialized U2-710 710Wh battery, it guarantees a range of up to 140 km or 6.5 hours in Eco mode.
The system adapts to your riding style, making climbs, heavy loads, and rough terrain easier than ever.
MasterMind Display + Specialized App
The MasterMind TCD display, integrated into the handlebar, allows you to:
Monitor speed, range, power, and more
Customize pedal assistance with MicroTune (10% increments)
Connect to the Specialized App for software updates, diagnostics, battery optimization, and anti-theft lock with alarm
Turbo System Lock with Smart Anti-Theft
Safety comes first with the Turbo System Lock, which allows you to:
Deactivate the motor via app with a single touch
Activate the motion sensor with alarm
Physically lock the battery or remove it to take it with you
Only you can reactivate the bike with your personal PIN or the app.
Mountain Bike DNA for Maximum Control
Every component of the Tero 4.0 is designed for off-road performance:
29” wheels with 2.35” Ground Control tires
SR Suntour XCR34-Boost fork with 110 mm travel
Tektro HD-T280 hydraulic disc brakes with 180 mm rotors
TranzX telescopic seatpost, perfect for technical sections
Ready for Every Use: Commuting, Trail, Touring
Thanks to its stable and comfortable geometry, and mounts for fenders, racks, and kickstand, the Turbo Tero 4.0 adapts to every lifestyle. It is also compatible with child seats and trailers.
Technical Specifications
Electronics
Motor: Specialized 2.0, 250W nominal, 70Nm torque, custom tuned
Display: MasterMind TCD with handlebar remote, integrated anti-theft, Bluetooth®, customizable display
Battery: Specialized U2-710, 710Wh, alloy case, charge level indicator
Wiring: Custom wire harness
Charger: 42V4A with Rosenberger connector (100–240V)
Frame and Suspension
Frame: E5 Aluminum, integrated and lockable battery in the down tube, internal cable routing, mounts for rack and lock
Seat collar: Alloy, bolt type, 34.9mm
Fork: SR Suntour XCR34-Boost, 110mm travel
Brakes
Front brake: Tektro HD-T280, hydraulic disc brake, 180mm rotor
Rear brake: Tektro HD-T280, hydraulic disc brake, 180mm rotor
Drivetrain
Shift controls: Shimano CUES 9-speed with indicator
Rear derailleur: Shimano CUES 9v, Shadow design
Cassette: Shimano CUES 9v, 11-41T
Chain: Shimano LG500
Crankset: Custom forged alloy, 170mm, CL 50.73mm, BCD 104mm
Front chainring: 40T
Wheels
Rims: Stout XC 29, 25mm internal width, disc brake specific
Front hub: Specialized, 15x110mm, 6-bolt, sealed bearings, 32 holes
Rear hub: Specialized, 12x148mm, sealed bearings, 32 holes
Spokes: DT Swiss Industry
Tires: Ground Control 2Bliss Ready, 29x2.35” (front and rear)
Inner tubes: Standard 40mm SV, 29x1.75–2.4
Cockpit
Handlebar: Specialized Trail, 6061 alloy, 8° backsweep, 6° upsweep, 27mm rise, width S: 720mm / M-XL: 750mm
Stem: Specialized Stealth, 14° angle, 31.8mm, integrated TCD mount
Grips: Specialized Trail Grips
Saddle: Bridge Sport with steel rails, 155mm
Seatpost: TranzX Dropper, 30.9mm – S: 100mm, M–XL: 120mm
Included Accessories
Additional Technical Data
Note
Technical specifications may change without notice depending on component availability.
Product images are for illustrative purposes only and may not perfectly reflect the described features.
Wherever the road – or trail – takes you, the Turbo Tero 4.0 will follow. Get on and turn every ride into a new exploration.
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.
