Max. torque¹

100

600

Max. motor power¹

100

400

Max. support¹

Rounded weight

Trick Check

Show everyone what you’ve got: Trick Check makes your skills measurable. Your tricks are recognised automatically and shown live on the display. Your best performances are saved in the eBike Flow app.²

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Extended Boost

Extended Boost is now even better: Customise 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 with the highest power density – making it ideal for performance rides.

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With the Performance Line SX, you'll experience a new riding experience, shaped by 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

The 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 pedal power.

Discover eMTB+ mode

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

For speedy 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.

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

Walk assistance and hill start assist

Full pannier bags on a bike-packing tour? Features such as walk assistance and hill start assist – both featuring Hill Hold – help to make handling an eBike under heavy load that much 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'll see how much capacity you have remaining with which to reach your destination. And you can choose the battery charge 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 your Apple Watch to your eBike and track your heart rate on your display while you ride – for an optimised training session.

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 will find insights into your tour and fitness data – to analyse and share, synchronised 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 pedal 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 features act as a deterrent and protect your eBike against theft. Make the most of the free eBike Lock additional theft protection or the eBike Alarm premium service in the Flow+ subscription, for example.⁵

Protecting your 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 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 the additional battery the size of a drinks bottle for even greater range and longer-lasting trail fun.

About the product

CompactTube 400

Slim, integrated, compact and delivering 400 watt hours at a weight of only around 2 kilos, it's 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

The System Controller is the minimalist control unit for eBikes with the smart system, and is fully integrated in the top tube.

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	25 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 the hub gear system and battery. The eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, via the eBike Flow app.
Exception gear shift detection: eShift hubs

² Maximum values: Deviations possible, depending on the hub gear system and battery. The performance values of this drive unit may be lower upon delivery. They can be increased and customised 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 eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, via the eBike Flow app.
Exception for gear shift detection: eShift hubs.

⁴Maximum values: Deviations possible, depending on the hub gear system and battery. The eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, via the eBike Flow app.
There is no backpedal function for the derailleur system, but it is optional for the hub gear system.
Exception for gear shift detection: eShift hubs

⁵ Maximum values: Deviations possible, depending on the hub gear system and battery. The eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, via the eBike Flow app. There is no backpedal function for the derailleur system, but it is optional for the hub gear system.
Exception for gear shift detection: eShift hubs

⁶ Maximum values: Deviations possible, depending on the hub gear system and battery. The maximum 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 eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, 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 specialist 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 eBiker, via the eBike Flow app. It's not possible to customise your riding mode on S-pedelecs.

⁸ Maximum values: Deviations possible, depending on the hub gear system and battery. Activation/deactivation of the various riding modes is carried out by the bicycle manufacturer and the specialist 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 eBiker, via the eBike Flow app. It's not possible to customise your riding mode on S-pedelecs.

⁹ Maximum values: Deviations possible, depending on the hub gear system and battery. The maximum 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 customised 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 eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, via the eBike Flow app.
Exception for gear shift detection: eShift hubs.

¹⁰ Maximum values: Deviations possible, depending on the hub gear system and battery. The maximum 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 eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 eBiker, via the eBike Flow app.
Exception for gear shift detection: eShift hubs

¹¹ The weight refers to the pure motor weight of the Hub Line – without control unit and cadence sensor. Support is based on intelligent sensor fusion, which is why maximum support is not specified as a percentage. Maximum values: Deviation possible depending on battery. The eBiker can activate/deactivate the riding modes via the eBike Flow app, the bicycle manufacturer or the specialist 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 enabled as standard on the Kiox 300, Kiox 500 and Purion 200 displays and must be enabled 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 the Race, eMTB+ and eMTB riding modes, but cannot be customised: Performance Line CX-R (BDU386Y), Performance Line CX Race Limited Edition (BDU376Y), Performance Line CX (BDU384Y), Performance Line CX (BDU374Y), Performance Line SX (BDU314Y). Customisation is 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 make use of these features, you'll need a paid Flow+ subscription. When using Flow+, the General Terms and Conditions (GTC) apply.
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The Flow+ subscription is subject to a charge. When using Flow+, the General Terms and Conditions (GTC) apply.
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