Our lightest drive unit: for sporty riding
Performance Line SX
Performance Line SX
Sporty lightness
When muscle power and electric support work in conjunction and you get top performance exactly when you need it: With the Performance Line SX, we are launching a sporty drive unit that is lighter and more compact than anything we have developed so far. For light eMTBs, eGravel and eUrban bikes.
At a glance
Up to 600 watts
Maximum power in the most compact space
Approx. 2 kilograms
Our lightest drive, inconspicuously installed
Max. 55 newton meters
Pedal fast, get powerful support
Sprint mode
For sporty eGravel and eUrban riding
Features and details
For sporty riding
Pedal faster, pick up speed even faster: The Performance Line SX works at least as hard as you do. When riding in a sporty style with a high cadence, it supports you disproportionately to your performance with peaks of up to 600 watts of motor power. With its sensitive and reactive response behavior, it is ideal for all those who ride in sporty style with electric support and are looking for a training effect.
Lightness – almost natural
A reduced pedal resistance of more than 50 percent compared to the Performance Line CX, a narrower design of the cranks and an almost silent motor – the Performance Line SX convinces in many respects. Its direct but sensitive response conveys the feel of conventional cycling and enhances it with the ease and fun of eBiking.
Multifaceted: sporty riding
You're looking for a challenge on the trail, on technically demanding passages and when riding uphill? Installed in light eMTBs, the Performance Line SX is the optimal piece of training equipment for you. But even if you're dreaming of long-distance adventures and don't yet know exactly which surfaces await you, the drive unit is ideally suited for powering eGravel bikes. You want to ride dynamically on the road with minimalist, agile eCity bikes? Here, too, the Performance Line SX is the right choice.
Light, compact, agile
Around 2 kilograms: The Performance Line SX is our lightest drive with the highest power density. Ride your eGravel bike dynamically into corners and carry your eUrban bike up to the fourth floor: The Performance Line SX reduces the total weight of your eBike, delivers greater agility and is ideal for fans of a sporty riding style. In addition, the compact drive unit disappears elegantly into the crank area of your eBike – so it looks like a conventional bike.
eBike Lock
Ideal addition to the lock: eBike Lock is your free additional theft protection. Lock and unlock your eBike automatically using your phone or display as a key.
Ride screen
Turn your phone into an eBike display: you can use the ride screen with the SmartphoneGrip. It not only shows you all the important riding data, but also offers fully-fledged navigation with 3D map display.
Display configuration
Personalise your display: configure your Kiox 300 or Kiox 500 display according to your needs. Create new screens containing your favourite information. Choose from over 30 screen layout options and arrange them according to your wishes.
eBike Flow App
The eBike Flow app is the centrepiece of our smart system and gives you a better riding experience: safer, more customised and more convenient. Updates keep your eBike up to date and provide it with new functions.
Theft protection
Our digital functions such as eBike Lock and eBike Alarm act as a deterrent and protect your eBike even better against theft.
Navigation
Route planning, navigation and activity tracking on a new level. We work with the best partners and use AI technology. For your ultimate eBike experience – before, during and after the ride.
Customisation
Design your own individual eBike experience – with a wide range of customisation options. But even better: your eBike understands your needs and learns from your riding behaviour with every pedal stroke.
Optimal setup for light, slim eBikes
Performance Line SX
The lightest drive unit in the Bosch range, exceptionally compact.
Sprint mode
Dynamic support according to the cadence – for fast sprints and steep climbs.
CompactTube 400
With 400 watt hours at just around 2 kilograms, it's a real energy champion.
System Controller
Reduced, minimalist, clean: This control unit is seamlessly integrated into the top tube.
Technical data
Filter options
| |
|---|---|
| System | The smart system |
| Gear type | Derailleur system/hub gear system* |
| Max. support level** (%) | 340 % |
| Maximum possible drive torque (Nm) | 55 Nm |
| Start-up behaviour | Sensitive |
| Max. support up to | 25 km/h |
| Backpedal function | No |
| Smart Walk Assist with Hill Hold | x |
| 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 |
| |
|---|---|
| System | The smart system |
| Gear type | Derailleur system/hub gear system* |
| Max. support level** (%) | 340 % |
| Maximum possible drive torque (Nm) | 55 Nm |
| Start-up behaviour | Sensitive |
| Max. support up to | 25 km/h |
| Backpedal function | No |
| Smart Walk Assist with Hill Hold | x |
| 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 |
* Maximum values. Deviations possible, depending on the hub gear system.
** 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. With the help of 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.
*** Optional only with hub gear system. There is no backpedal function with the derailleur system.
**** Exception: eShift hubs.
FAQs & more
The Performance Line SX is significantly more compact in design and lighter in weight. Due to the lower torque, however, it requires a higher cadence to achieve the same support.
Would you like to compare different drive units? You can find detailed information and technical data 
here.
You can search for specific error codes in the search bar. We provide all codes with a description and steps to a possible solution.
Error codes consist of a classification and a sequence of digits and letters. These codes are used to identify malfunctions that may occur while your eBike is in operation.
For the drive unit and display components, the operating temperature is 23°F to 104°F and the storage temperature is 50°F to 104°F.
The ideal storage temperature for the battery is 50°F to 68°F.