Haibike
HardNine 4

Product details

CategoryeMTB > Hardtail eMTB
Max. supported speed25 km/h
Model year2024
Permissible total weight120 kg
Frame materialAluminum
Number of gears9
Wheel size29"/622mm

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Bosch ePowered
Performance Line eBike motor isolated on a white background.
Motor

Performance Line

BDU365

Sporty riding. Performance Line always delivers support precisely when you need it – whether you’re on a leisurely bike ride or tackling mountainous terrain.

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PowerTube 400 eBike battery isolated on a white background.
Battery

PowerTube 400

The PowerTube 400 for the Bosch eBike system 2 brings your stylish, lightweight city bike up to speed and ensures carefree fun.

Battery safety at Bosch

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Display

Purion

Focus on the essential. Purion shows you all the key information at the click of a thumb.

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Mann fährt mit einem eBike einen steilen Hang hinauf, umgeben von einer beeindruckenden Berglandschaft.

The real eMTB experience. Developed by Bosch.

A real eMTB experience is not defined by numbers. It is created in the moment, through a perfect riding experience that delivers precision and pinpoint accuracy. With performance that goes beyond pure power. Performance that you can only feel with a Bosch system.

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Bosch voted the best brand for eBike motors in 2025

Over 15,000 readers of E-Mountainbike magazine cast their votes and chose Bosch eBike Systems as the best brand in the Motors category for 2025.

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