Bosch Performance Line SX eMTBs
The Performance Line SX is Bosch’s lightweight motor for light eMTBs: around 60 Nm of torque, a high peak power for its size and a preference for a fast cadence.
- Builds
- 19
- Brands
- 6
- Torque (as quoted)
- Up to 60 Nm · 60 Nm · 55 Nm
- Battery
- 400 Wh
- Price
- ≈€4,199 – €11,351
- Lightest
- 16.8 kg
Brands: Cube, Canyon, Commencal, Mondraker, Pivot, Kona · filter in catalog →
About the Bosch Performance Line SX
The Performance Line SX is Bosch's lightweight motor for light e-MTBs, gravel and urban bikes, weighing about 2.0 kg. It runs on the Bosch smart system and was introduced for model year 2024.
It delivers 600 W peak, but the output rises with cadence: Bosch quotes 400 W at 70 rpm, so the motor rewards fast pedalling. A July 2025 software update raised torque from 55 to 60 Nm and maximum support from 340% to 400%.
It is usually paired with the CompactTube 400 or 600 battery, with the PowerMore 250 range extender available. Remotes and displays include the System Controller with Mini Remote and the Purion or Kiox units, all managed via the eBike Flow app.
The SX suits riders who want a lighter, more natural-feeling bike with moderate assistance and who pedal at higher cadences. It sits between ultra-light systems such as TQ and full-power motors like the CX.
Bosch Performance Line SX: specs
| Version | Torque | Peak power | Weight | Notes |
|---|---|---|---|---|
| Performance Line SX (BDU314Y) | 60 Nm (55 Nm before July 2025 update) | 600 W | 2.0 kg | Up to 400% support (340% before update); 400 W at 70 rpm, peak power reached at high cadence. |
- Launched
- 2023 (model year 2024); torque update July 2025
- System
- Bosch smart system: CompactTube 400/600, PowerMore 250 range extender, System Controller with Mini Remote, Purion/Kiox displays, eBike Flow app.
- Batteries
- CompactTube 400 Wh, CompactTube 600 Wh; PowerMore 250 range extender
- Assist modes
- Eco, Tour+, eMTB / eMTB+, Sprint, Turbo, Auto and others via app; Extended Boost; walk assist with Hill Hold
- App & tuning
- Bosch eBike Flow app with OTA updates; July 2025 update raised torque to 60 Nm and support to 400%; Upgrade 2.0 adds adjustable Extended Boost and Trick Check.
Strengths and drawbacks
Strengths
- + Lightest Bosch motor at about 2.0 kg
- + 600 W peak is high for a light-assist motor
- + Full smart-system ecosystem and dealer network
Drawbacks
- – Needs high cadence to reach full power (400 W at 70 rpm)
- – Tests report weaker starts on steep terrain and louder operation than some rivals
- – Not eligible for the 120 Nm Upgrade 2.0 torque increase
Error codes & firmware
All Bosch Performance Line SX bikes, by price
Prices are manufacturer RRPs in the brand’s currency; ≈€ figures use approximate exchange rates.
Bosch Performance Line SX: FAQ
How powerful is the Bosch SX?
Bosch lists 60 Nm, 600 W peak and up to 400% support. The 600 W peak requires high cadence; at 70 rpm Bosch quotes 400 W.
Did the SX get the 2026 120 Nm update?
No. Upgrade 2.0 gave the SX adjustable Extended Boost and Trick Check; the torque increase to 120 Nm applies only to the CX Gen 5, CX-R and Cargo Line.
Which batteries work with the SX?
Typically the CompactTube 400 or 600, optionally with the PowerMore 250 range extender.
Which eMTBs use the Bosch Performance Line SX?
19 builds in our catalog from 6 brands: Cube, Canyon, Commencal, Mondraker, Pivot, Kona.
What is the cheapest eMTB with the Bosch Performance Line SX?
The Cube AMS Hybrid ONE44 C:62 Pro 400X at €4,199.
What is the lightest eMTB with the Bosch Performance Line SX?
The Cube AMS Hybrid ONE44 C:68X SLT 400X at a claimed 16.8 kg.
What battery sizes come with the Bosch Performance Line SX?
All builds use a 400 Wh battery.