HUB MOTOR, GEARING, BATTERY/DISPLAY, WEIGHT, VINTAGE LIGHT
Stella's five strong points
The technical characteristics of the Stella pedal assist bicycle are fundamental in ensuring a long bicycle lifetime, low maintenance requirements and above all top-level performance.
The following are its main mechanical and electronic devices, all compliant with the European Directive: Hub motor, gearing, battery/display, weight, vintage light.
LATEST-GENERATION HUB MOTOR
Stella uses a new-concept hub motor. Perfectly in line with the bike’s construction philosophy, it is gearless so it switches in smoothly when on the move. The controller and a riding speed sensor inside the motor ensure simple, uncomplicated operation. The drive unit does not have any components visible on the outside of the e-bike and ensures complete control and easy use. In compliance with regulatory requirements, the motor delivers a maximum power of 250 W and cuts out its assistance above 25 km/h or when the rider stops pedalling.
HIGH-PERFORMANCE 9-SPEED GEARING
The Shimano SLX 9-speed gearing enables Stella to deal with routes of various kinds. A comfortable, user-friendly city bike, it is ideal for getting around town easily, but also ensures good performance on routes with steeper gradients, while always protecting the environment.
LITHIUM POLYMER CELL BATTERY
COMPACT FULL CONTROL DISPLAY
The battery of the Petrini e-bike uses lithium polymer cells, is completely concealed in the seat post and can be extracted and charged even at a distance from the bicycle. When the plug concealed underneath the seat is connected to any power socket, the battery is easily charged by means of a device with passive bms, which ensures the longest possible battery lifetime. The battery provides a range of 55 km (estimated) in the urban cycle.
Stella has a compact, user-friendly LCD display showing travel speed, chronometer, average speed, clock and other functions. The button on the control device, with its 5 speed settings, can easily be pressed to switch from pedal assist mode to unassisted (level 0) mode, providing TWO BICYCLES IN ONE. The digital display also indicates the remaining battery charge level.
What really makes the Petrini pedal assist bicycle unique is its extremely light weight, a feature which makes it easy to switch from pedal assist to unassisted mode and vice-versa; the operating weight is no more than 16 Kg.
The LED light of the Petrini e-bike is a very distinctive feature and an extremely elegant plus factor. Inspired by the old carbide lamps of the early 20th century, this vintage light, a skilful blend of technology and design, marries history with evolution and gives the Petrini bike class and refinement. The light is crafted from a solid piece of light alloy, provides impressive luminosity and carries a serial number.
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