About the car

e-bullet.cz® is the project of the first Czech racing all-electric special and show car. The chassis consists of a structure made of CrMo4 thin-walled seamless tubes in combination with aluminium, dural, carbon materials and is inspired by the already developed and produced Sigma TN chassis of Sigma Motor s.r.o.

The 4×4 car is driven by four powerful and at the same time light BLDC motors, where each wheel has its own electric motor with an electronic inverter and control unit, all centrally controlled by a unique SW from the development at Brno University of Technology. The bodywork is taken from the production Hyundai i30, modified for mounting on a tubular chassis and designed by Prokop Design.

For the show car events, preparation for the quick-setting of the second seat and a display unit in front of the passenger with on-line display of essential driving data (speed, instantaneous power of individual engines, overload, braking intensity of individual wheels, instantaneous distribution of power or braking effect on individual wheels, …). More info in the “show car” section.



  • Net weight: up to 1,200 kg
  • Weight with driver: up to 1,290 kg
  • Vehicle length: approx. 4,340 mm
  • Vehicle width: approx. 2,000 mm
  • Wheelbase: approx. 2,650 mm
  • Wheelbase PN: approx. 1,950 mm
  • Wheelbase ZN: approx. 1,950 mm

Powertrain and battery

  • Electric motors of special design: 4 pcs
  • Power output of 1 motor: 75 kW / 102 PS
  • Total power: 300 kW/407 PS
  • Torque: up to 1,200 Nm
  • Without gearbox
  • Battery: 18650 cell assemblies
  • Battery capacity: approx. 40 - 60 kWh (depending on deployment)


  • Comb steering with electric power steering
  • Aluminum comb
  • Turning radius: approx. 6.0 m
  • Steering speed: 2 steering revolutions from stop to stop


  • Front axle: trapezoidal, coil-spring push-rod suspension, adjustable dampers, racing stabiliser
  • Rear axle: trapezoidal, coil-spring push-rod suspension, adjustable dampers, racing stabiliser


  • Modified from production Hyundai i30 (2021)
  • Non-self-supporting - mounted on tubular car frame
  • Windshield original, other Makrolon


  • Type: truss with protective frame
  • Tubes: seamless
  • Tube material: 25CrMo4