Max. torque¹

100

600

Max. motor power¹

100

400

Max. support¹

4.4

Rounded weight

Trick Check

Show what you can do: Trick Check makes your skills measurable. Your tricks are automatically recognized, shown live on the display, and your best performances are saved in the eBike Flow app.²

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Extended Boost

Extended Boost is now even better: Customize the extra boost in the eBike Flow app and use it across all riding modes and other drive units.³ Allowing you to overcome obstacles such as steps, roots, or small rocks.

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Our lightest drive unit with the highest power density – ideal for performance riding.

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With the Performance Line SX, you'll enjoy a new riding experience of freedom and flexibility.

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The compact and stylish Performance Line SX literally disappears into your eBike.

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Power and control

eMTB+ mode combines the precise controllability of eMTB mode with the full power of Race mode – with maximum support of 400%. For more powerful support with the same amount of rider power.

Discover eMTB+ mode

Close-up of a handlebar where someone selects sprint mode on the Kiox 300.

For fast eBiking

Sprint mode offers you dynamic support – for sprints and steep climbs. In the eBike Flow app, you can fine-tune the riding mode and adapt it to your route.

Discover Sprint mode

A man rides an eBike through a narrow, cobblestone alleyway.

Walk assistance and hill start assist

Full saddle bags on a bike-packing trip? Functions such as walk assistance and hill start assist – both including Hill Hold – help make handling a heavily laden eBike easier.

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.

Precise push. More momentum.

Extended Boost provides an intuitive, residual input of up to two metres to overcome obstacles without a full stroke of the pedals. You can set the length of the burst in the eBike Flow app.

Plan your route – with Range Control: With the eBike Flow app, you can see how much remaining capacity you have to reach your destination. And you can choose the battery level you want to arrive with.

Discover eBike Flow app

View of a smartphone showing the battery level being set for when the goal is reached via the eBike Flow app.

Connect your heart rate monitor or Apple Watch to your eBike and track your heart rate on the display while you ride – for an optimized workout.

View of the handlebars of an eGravel bike with Kiox 500, displaying the heart rate.

The eBike Flow app records your ride data. In the statistics, you'll find insights into your tour and fitness data – to analyze and share, synced with Strava or Apple Health.

You sit on your eBike and sync your values with Strava using the eBike Flow app.

You can compare your own power and motor power, and see which riding modes you used and how often. You also benefit from an annual overview of your most important ride data.⁴

A person holds a smartphone and checks the statistics in the eBike Flow app.

Our digital functions act as a deterrent and protect your eBike against theft. Use the free eBike Lock additional theft protection or the eBike Alarm premium service included in the Flow+ subscription, for example.⁵

Protect eBike

The smartphone is held in one hand, displaying the home page of the eBike Flow app. The other hand is gripping the eBike handlebar.

eShift makes gear changes easier and more efficient. Depending on the variant, you can shift gears easily and precisely yourself, or enjoy smooth gear changes performed automatically.

Discover eShift

View of the handlebars and the Kiox 300 with the eShift setting open.

A natural riding experience is individual – with the eBike Flow app, you can create a riding mode to suit your needs.

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The eBike rider is sitting on his eBike and looking at the home page of the eBike Flow app on his smartphone.

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PowerMore 250

Portable energy reserve: PowerMore 250 is an additional battery about the size of a water bottle for even more range.

About the product

CompactTube 400

Slim, integrated, compact, and with 400 watt hours at a weight of just around 4.4 lbs, this battery is a real energy champion.

About the product

Cropped illustration of a System Controller and a MiniRemote, displayed side by side.

System Controller with Mini Remote

Integrated into the top tube, the System Controller is the minimalist control unit for eBikes with the smart system.

About the product

ConnectModule

BCM3100

The basis for digital theft protection: As a technology permanently installed on the eBike, it ensures that your eBike is protected online and digitally.

About the product

Technical data
	Performance Line SX (BDU314Y)²
eBike system	The smart system
Shifting system type	Derailleur system, hub gear system
Max. support (%)	400 %
Maximum possible drive torque	60 Nm
Start-up behavior	Natural, sensitive
Max. supported speed	32 km/h
Backpedal brake	x
Walk assist with Hill Hold	j
Hill start assist with Hill Hold	j
Gear shift detection	No
Weight, approx.	2,0 kg
Rated continuous output	250 W
Maximum power	600 W
Max. power at a cadence of 70 rpm	400 W
Max. power-to-weight ratio, approx.	300 W/kg

¹Maximum values: Deviations possible, depending on hub gear system and battery. The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated. Using the custom riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app.
Exception gear shift detection: eShift hubs

² Maximum values: Deviations possible, depending on hub gear system and battery. The performance values of this drive unit may be lower upon delivery. They can be increased and customized using the eBike Flow app. It should be noted that higher performance values can lead to increased wear and have a negative effect on the range.
The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated. Using the custom riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app.
Exception gear shift detection: eShift hubs.

⁴Maximum values: Deviations possible, depending on hub gear system and battery. The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated. Using the custom riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app.
There is no backpedal function for the derailleur system, but it is optional for the hub gear system.
Exception gear shift detection: eShift hubs

⁵ Maximum values: Deviations possible, depending on hub gear system and battery. The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated. Using the individual riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app. There is no backpedal function for the derailleur system, but it is optional for the hub gear system.
Exception gear shift detection: eShift hubs

⁶ Maximum values: Deviations possible, depending on hub gear system and battery. The max. support of 600% relates to speeds of up to 15 km/h and can be increased in the Race, Turbo, eMTB+, Cargo and Auto riding modes. The values can be set individually to a limited extent using the eBike Flow app. It should be noted that higher performance values can lead to increased wear and have a negative effect on the range.
The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated. Using the custom riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app.
Exception gear shift detection: eShift hubs

⁷ The various riding modes are activated/deactivated by the bicycle manufacturer and the dealer. A maximum of four riding modes, in addition to Off mode, can be activated in the display. Using the individual riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app. It's not possible to customise your riding mode on speed eBikes.

⁸ Maximum values: Deviations possible, depending on hub gear system and battery. Activation/deactivation of the various riding modes is carried out by the bicycle manufacturer and the dealer. A maximum of four riding modes, in addition to Off mode, can be activated in the display. Using the individual riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app. It's not possible to customise your riding mode on speed eBikes.

⁹ Maximum values: Deviations possible, depending on hub gear system and battery. The max. support of 600% relates to speeds of up to 15 km/h and can be increased in the Race, Turbo, eMTB+, Cargo and Auto riding modes. The performance values of this drive unit may be lower upon delivery. They can be increased and customized using the eBike Flow app. It should be noted that higher performance values can lead to increased wear and have a negative effect on the range.
The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated. Using the custom riding modes, the modes can be configured according to the individual needs of the rider, via the eBike Flow app.
Exception gear shift detection: eShift hubs.

¹⁰ Maximum values: Deviations possible, depending on hub gear system and battery. The max. support of 600% relates to speeds of up to 15 km/h and can be increased in the Race, Turbo, eMTB+, Cargo and Auto riding modes.
The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer.
A maximum of four riding modes, in addition to Off mode, can be activated. The individual riding modes can be configured according to the individual needs of the eBike rider via the eBike Flow app.
Exception gear shift detection: eShift hubs

¹¹ The weight refers exclusively to the motor weight of the Hub Line – without control unit and cadence sensor. The support is based on intelligent sensor fusion, which is why no percentage figure is given for maximum support. Maximum values: Deviation possible depending on battery. The rider can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the dealer. A maximum of four riding modes, in addition to Off mode, can be activated.

Keep in mind, though, the eBike manufacturer can set a limit on the maximum torque at the factory. In the eBike Flow app, you can only adjust the maximum torque up to the level the manufacturer has set for you.
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Trick Check works with the Performance Line CX (BDU384Y), Performance Line CX-R (BDU384Y), Performance Line CX Race (BDU374Y), Performance Line CX (BDU374Y) and Performance Line SX (BDU314Y) and on the following displays: Kiox 300, Kiox 400C, Kiox 500, Purion 200, Purion 400. Trick Check is not active by default on the Kiox 300, Kiox 500 and Purion 200 displays and must be activated manually under > "Settings > Display > Trick Check".
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Extended Boost is already available for the following drive units of the smart system in Race, eMTB+, and eMTB riding modes, but cannot be customized: Performance Line CX-R (BDU386Y), Performance Line CX Race Limited Edition (BDU376Y), Performance Line CX (BDU384Y), Performance Line CX (BDU374Y), Performance Line SX (BDU314Y). Customization will be available in every riding mode and for the following drive units of the smart system from mid-2026: Cargo Line (BDU384Y), Cargo Line (BDU374Y), Performance Line Sprint (BDU314Y). Extended Boost is not available in Limit mode.
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To use these functions, you need a paid Flow+ subscription. When using Flow+, the General Terms and Conditions apply.
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The Flow+ subscription is subject to a charge. When using Flow+, the General Terms and Conditions apply.
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