A new generation of fully sprung SONIC mountain e-bikes. The EVA TR 1 model is equipped with great components from Bosch, Shimano, SR Suntour and others .... and the most modern frame geometry, which makes the e-bike a great e-bike for difficult terrain.

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Why this e-bike?

  • motor: Bosch Performance Line CX 4. gen
  • battery: 625 Wh / 500 Wh
  • frame size: 40 cm, 44 cm, 48 cm 
    frame: 40 cm battery 500 Wh
    frames: 44 cm a 48 cm battery 625 Wh
  • speeds: 12 (10-51)
  • display: Bosch Purion
  • fork stroke: 120 mm

Monkey Link is a unique magnetic system, thanks to which components such as the headlight, taillight or fenders can be easily mounted or removed. Power is supplied directly from the battery and is controlled via the display.

More information about the Monkey Link system


The SRAM Eagle derailleur is equipped with a proven design, innovative technology combined with accuracy and reliability. Technology pulleys X-SYNC allows for better efficiency, more precise shifting and quieter. Seamlessly handle long hikes with plenty of altitude.



Click to display the e-bike range calculator

E-bike range calculator

Total weight of rider (incl. equipment)
Predominant route profile
Battery capacity
For 80 kg riders, with a battery capacity of Wh when driving with average assistance after a predominantly , the range on this e-bike will be approximately
(Setting specific assistant mode, electro-technical state, battery age, ambient temperature, aerodynamics and driving technique could affect the overall range)

The BULLS SONIC EVA TR 1 e-bike is a new generation of fully sprung mountain e-bikes. It is developed based on the research results of the Fraunhofer Institute. It is equipped with an E-Power chassis, which combines the latest frame geometry, optimal ergonomics and targeted oversizing for the best possible control and maximum energy supply. One of the many advantages is especially quick and easy removal of the battery by 45 degrees. The BULLS SONIC EVA TR 1 e-bike is equipped with an SR Suntour fork with a stroke of 120 mm and a 12-speed Sram SX Eagle gearbox.

Nothing stands in the way of challenging trips and training in nature. Do you need advice on choosing the right e-bike? Use our guide to choosing e-bikes or contact us directly.

BOSCH Performance Line CX 2020

Center motors are currently the most used drives in e-bikes and though they didn't arrive until 2014, the two prefers will very quickly gain tremendous popularity . Center engines almost extrudable hubs engines and are probably already in all types of bikes .

Battery Bosch PowerTube 625

Battery Bosch PowerTube 625

ekolo.cz upozorňuje In greatebike.eu, the battery and charger are always included in the price of the e-bike.

Thanks to the nominal capacity of 16.7 Ah and approx. 625 Wh energy, a lithium-ion battery brings maximum ranges and heights within your range. The well-secured PowerTube 625 won't fall out of its shelter, even in difficult terrain. But it is still easy to remove. After approx. After 3.7 hours, the battery is fully charged with a fast 6 A charger, while half of the charge is already reached after approx. 1.4 hours.



Display BOSCH Purion

Display BOSCH Purion

Purion is a minimalist on-board computer for anyone who wants to have a sleek look on the handlebars, whether for city or off-road use . You can conveniently get all the important information at the touch of a button while driving, while both hands remain on the handlebars . Five different driving modes give you the right support in every situation .


BULLS is one of the world's leading manufacturers of e-bikes. They introduced the first e-bike in 2010 and since then, year after year, they prove that they really can do it. In BULLS e-bikes, there is a great combination of quality, great equipment and beautiful design. They show quality and precise processing from the point of view.

Very popular are off-road all-suspension eMTB e-bikes with the newest motors and high battery capacity.

We are a specialized shop and testing center for BULLS e-bikes. See our current offer of BULLS e-bikes.


Drive type BOSCH Performance Line CX 4. generace
Control Bosch Purion
Capacity and battery type 500 Wh / 625 Wh
Frame type and material aluminium
Front fork SR Suntour Lytro 34 120 mm
Number of gears 12 speeds
Shifters Sram SX Eagle 12 speeds
Derailleur Sram SX Eagle
Type and brand of brakes Shimano BR-MT420/400 hydraulic discs 203mm
Crankset Sram /BULLS
Cassette Sram Eagle 10-50T
The stem BULLS The Frog, 35mm
Handlebars BULLS Riser
Saddle Selle Royal Vivo
Seat post BULLS aluminium
Load capacity 125 kg
Rims Rodi Tryp30
Tyres Schwalbe Smart Sam 27,5x2,60
Silencer SR Suntour Edge R 120mm