Performance Line CX is Bosch’s sporty mid-drive for eMTB and heavy-commuter riding. The 4th-generation unit (model year 2021 on) delivers up to 85 Nm of torque, with an eMTB mode that adapts assist to how hard you’re pedaling. The figures below are for that unit.
Support level (%): Maximum Torque Drive (Nm): Maximum Torque Drive:
TURBO: 340 TURB0: 85*** >120
eMTB**: 140-340 eMTB**: 85
TOUR: 140 TOUR: 50
TOUR+****: 60-340 TOUR+****:85
ECO: 60 ECO: 40
**In the case of the Performance Line and the Performance Line CX, eMTB mode can replace Sport mode. It can be activated/ deactivated by the bicycle manufacturer and a Bosch-trained dealer.
***Since model year 2021, the drive unit has been offered with 85 Nm; the previous versions offer 75 Nm. Some Drive units from model year 2020 can be upgraded to 85 Nm.
****For the Performance Line CX, Tour+ mode can replace Tour mode. Activation/deactivation can be carried out by the bicycle manufacturer and the specialist dealer.
Performance Line CX for Smart System
Most Smart System Performance Line CX bikes ship with the same 4th-generation, 85 Nm drive unit described above. On the Smart System it works with the eBike Flow app, where you can fine-tune assist levels and more. In 2025 Bosch also introduced a 5th-generation Performance Line CX (drive-unit code BDU384Y), which can be eligible for Bosch’s free Performance Upgrade in the eBike Flow app and then runs more torque and support than the numbers above. Eligibility depends on the physical drive unit and on the bike maker releasing the upgrade for that bike, so a bike being “Smart System” doesn’t make it eligible. If you want to know what your bike has, call or text us at 646-736-7716.
Intelligent Theft Protection
You can easily use the eBike Lock function via the eBike Flow app on eBikes with the smart system. After a one-off installation, the smartphone acts as your digital key for deactivating motor support. Recognition uses Bluetooth technology, so your smartphone can stay in your pocket. Short acoustic signals, lights and symbols on the LED Remote, display or smartphone indicate whether eBike Lock is active and thus motor support is deactivated. eBike Lock in the smart system offers free, additional theft protection and greater security. If you lose your smartphone, you can simply log into the eBike Flow app with your account on another smartphone.