Polygon Kalosi Altera ST – Urban E-Bike

Beyond the Cityscape

The Polygon Kalosi Altera ST combines convenience, performance, and comfort in one sleek urban ride. Designed for effortless daily mobility, it delivers intuitive controls, smooth pedal assistance, and confidence-inspiring geometry for every journey.

Low Effort, High Enjoyment

The pedal assist system amplifies your effort up to 25 km/h with five assist modes and 55Nm of torque. Powered by a large 690Wh integrated battery, the Kalosi Altera ST lets you climb hills and cruise city streets with ease — reaching up to 120 km per charge.

Built for Everyday Rides

Equipped with mudguards, integrated lights, and a rear rack, the Kalosi Altera ST is ready for commuting in all conditions. Ride safely, comfortably, and confidently — day or night.

Comfortable Geometry

Designed with urban comfort in mind, the Kalosi Altera ST features a step-through frame, adjustable stem, and upright riding position. This geometry reduces strain and enhances control for relaxed, confident riding.

Technical Specifications