With its autumn 2025 update, Bosch eBike Systems is introducing an exciting innovation that significantly enhances the lightweight Performance Line SX motor. The compact drive, which is also installed in many urban e-bikes, now offers up to 400 percent assistance – a clear leap forward from the previous 340 percent. This means that the electric assistance is now four times greater than the rider’s own power output! This not only makes riding more powerful, but also more comfortable, as less effort is required. This extra power is likely to be particularly noticeable on inclines or when carrying heavy loads.
Performance levels have also been increased: maximum torque rises to 60 Newton metres (up from 55), with peak power at 600 watts. This means the motor responds even more directly and delivers more reserves on steep climbs or when starting off. The update is complemented by the eMTB+ riding mode, which automatically adjusts power delivery to the terrain and riding style and is available for the SX motor for the first time.
The eBike Flow app can be used to determine whether the additional power should be used – because more power also means higher energy consumption. Practical: the update is installed directly via the app, so there is no need to visit a workshop!
In addition to improved performance, the update brings additional enhancements for navigation, display customisation and shifting comfort. New layouts for the Kiox 300, Kiox 400C and Kiox 500 displays allow for a more personalised presentation of riding data, while QR code support provides direct links to relevant help pages. The eShift electronic shifting solution now offers optimised software for automatic shifting and additional compatible shifting solutions from Shimano. There are also new options for the Rohloff E-14, which now offers a choice between manual and automatic shifting.
With its autumn update, Bosch eBike Systems is making the SX motor more powerful, smarter and more versatile – demonstrating how software and hardware are increasingly coming together to form a flexible, customisable overall system.
