Flow App Release 1.36

An eMountain biker sits on his eBike and takes a break to check his smartphone. He’s at a viewpoint overlooking a picturesque bay with a coastal village in the background.

Your eBike senses your intentions. With this update, your eBike motor is now even smarter. Customize the Extended Boost to master every obstacle with confidence. Thanks to the Drivetrain Tensioner, feel your power turn into propulsion without delay. Off the trail, the new eBike Assistant in the eBike Flow app is ready to answer your questions. Discover a new level of control, precision, and support.

View of the Bosch eBike Flow app showing the "Extended Boost" setting in the eMTB+ mode. The slider for the amount of thrust after pedaling is set to 10.

Your setup. Your boost.

Use the crucial boost to overcome roots or steps on the trail with ease. Now you can tailor the Extended Boost in the eBike Flow app to fit your riding style. This lets you use Extended Boost flexibly across all riding modes and with different Drive Units.¹

The motor boosts for up to two meters. The powerful, perfectly timed impulse helps you clear rocks, steps, or roots with ease.

With a new slider in the eBike Flow app, you can adjust the boost duration for each riding mode individually. The scale goes from zero (disabled) to ten for a maximum boost of up to two meters.¹ Find this setting in the menu under "custom riding modes > Extended Boost".

Whether you're on your eMTB trail or riding your cargo eBike over a curb, the extra boost gives you more reliability with different drive units and riding modes.

With more direct traction when you start pedaling, your drive unit responds instantly and gives you full control — as if your eBike were glued to your foot. Available for the Performance Line CX-R (BDU386Y) and Performance Line CX (BDU384Y) in Race, eMTB, and eMTB+ riding modes.

A software optimization allows us to pre-tension the drivetrain and prevents the motor and rear wheel from freewheeling in technical riding situations. This reduces the free travel on the pedal and the delay when pedaling, allowing the motor to convert your power directly into precise propulsion.

The Drivetrain Tensioner is already active for you by default. With a future update to the eBike Flow app, you'll be able to turn the feature on or off.

Screenshot of the E-Bike Help Center app. Overview of components like app, batteries, displays, and drive units to help you find solutions.

Quick Help. Instantly in the app.

The new, AI-powered eBike Assistant in the eBike Flow app answers your questions about Bosch components and features, ensuring you get the right help quickly and easily.

The eBike Assistant responds to your questions in dialogue, using content from our Help Center, website, and user manuals. The service starts in a beta phase, where we want to test it with you and keep improving. If an answer isn't quite right, you'll find reliable information in the manual—or you can ask us your question directly via our contact form. The eBike Assistant is available only in the German and English versions of the Help Center.

Enjoy an even faster response from your eBike. When your speed changes suddenly, you're instantly in the right gear, allowing you tokeep your rhythm.

With automatic transmissions, eShift delivers smoother shifts across multiple gears. With hub gears from Rohloff (Rohloff E-14) and Shimano (Shimano NEXUS Di2), you can switch gears even faster and more responsively, as eShift skips several gears at once.

An eMountain bike rider descends a steep rocky slope, kicking up dust. Loose stones are visible along the path, and a mountain rises in the background.

Adjust the traction control to your riding style now – for more control on technical sections. You can switch the Drivetrain Tensioner on and off for each riding mode, and with Trick Check, recorded tricks remain visible for longer. The remaining charging time for your battery appears on your display while you are charging.

An eBike rider jumps his turquoise mountain bike over an earthy hill against a blue sky.

The trail becomes a challenge, the route an adventure. The new Trick Check function automatically recognises your tricks, shows them on your display and saves them in the eBike Flow app. You can now also see your heart rate data and save your favourite places as favourites. We are also expanding the eShift portfolio.

Woman with a pink helmet and gray scarf stands next to an eBike at the bike racks, smiling.

Presented exclusively at the CES: the new "Mark eBike as stolen" function for the eBike Flow app. If your eBike is stolen, you can mark it digitally and make it obvious that it has been stolen. This increases your chances of getting your eBike back.

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Customization available in every riding mode and for the following drive units of the smart system: Performance Line CX-R (BDU386Y), Performance Line CX Race Limited Edition (BDU376Y), Performance Line CX (BDU384Y), Performance Line CX (BDU374Y), Performance Line SX (BDU314Y), Performance Line Sprint (BDU314Y), Cargo Line (BDU384Y), Cargo Line (BDU374Y). The Extended Boost is not available in the Limit mode.

Note: In some cases, it may take several days for the update to appear in the Apple App Store or Google Play Store.

Once you've downloaded the new version of the eBike Flow app, update your eBike with the smart system using the eBike Flow app. This lets you access all the features and improvements we've listed here. Please make sure all components are attached to your eBike before updating your eBike.
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