Bosch Performance Line SX: A Revolution in Lightweight eBike Motors

Light, Powerful, Efficient eBike Motor

In the vast landscape of two-wheeled travel, there's an exciting development straight out of Germany. If you're a high-speed seeker or a mountain trail conqueror, prepare to have your world rocked. Bosch, a name synonymous with quality and innovation, is taking a lighter approach, and it could change the way we think about e-biking.

As autumn leaves start to turn, we'll be introduced to Bosch's new Performance Line SX motor. Now, I'm no stranger to raw power and innovation, but the SX is an enticing proposition. This featherweight champ tips the scales at a mere 2kg – that's less than a family-sized bag of sugar, folks. But don't let its size fool you, this diminutive dynamo delivers a potent punch, with a reported peak power output of 600W and 55Nm of torque.

To keep the biker juiced up on their trail-blazing adventures, Bosch is introducing a new CompactTube 400 battery. Not only does it keep the weight low at an approximate 2kg, it also boasts the highest energy density in the brand's line-up. Combine this with the SX motor, and we're talking about a total weight of 4kg. It's clear Bosch is redefining what power-to-weight ratio means in the e-bike market.

This zippy combination is set to infiltrate the mountain, gravel, and urban e-bike realms, making the thrill of power-assisted cycling accessible to a broader range of riders. What's even better? This motor and battery combo is expected to be available as early as this autumn. Now, that's a reason to anticipate the cooler months, isn't it?

Bosch's innovation shines through not only in weight and power but also in the user experience. According to them, this motor offers a highly sensitive response, making your ride feel more natural. Plus, the SX motor is designed to support high-cadence efforts, meaning the faster you pedal, the more assistance you get. That's what I call a beautiful symbiotic relationship.

Among the other features, a new “Sprint” mode is particularly exciting, supporting riders to accelerate swiftly and maintain speeds close to the motor’s power cut-off limit. Picture yourself blasting off from traffic lights or quickly reaching top speeds on high-cadence sections. Now, that's the kind of rush adrenaline junkies live for.

In terms of efficiency, Bosch promises 50% less pedal resistance than previous power units, thanks to a new sealing concept in the motor and narrower cranks with a Q-factor of 160mm. This is a game-changer for those speedy gravel bikes, ensuring an easy ride even beyond the 25 km/h speed limit.

The compact design of the Performance Line SX drive unit is another exciting aspect. The sleek look will appeal to those riders who want the power of an e-bike without compromising the classic bike aesthetic. This is a perfect fusion of style and function – an absolute winner in my book.

In conclusion, the new Performance Line SX from Bosch is a marvel of innovation. It beautifully combines lightness, power, and design, all while offering a more natural riding sensation. It's clear to see that Bosch has put a lot of thought into the needs of sporty, fast-paced riders, and the result is nothing short of impressive. Whether you're an urban commuter or an off-road adventurer, there's plenty to look forward to in this next chapter of e-biking. So, gear up folks, the future of e-biking is just around the corner, and it's lighter, faster, and more exciting than ever before.


  1. Lightweight: The Performance Line SX motor weighs only 2kg, and the total system weight, including the battery, is only 4kg. This makes it significantly lighter than many other systems in the e-bike market, which could translate into a more nimble ride.
  2. Powerful: Despite its compact size, the motor delivers a peak power output of 600W and 55Nm of torque, making it a capable choice for tackling a variety of terrains and challenges.
  3. Efficient: Bosch claims that the motor offers 50% less pedal resistance compared to previous models. This improvement could make e-biking more enjoyable and less strenuous, particularly at higher speeds.
  4. Sleek Design: The motor's slim, compact design will appeal to those who prefer the look of a traditional bike while enjoying the benefits of electric assistance.
  5. Natural Riding Sensation: The motor's sensitive response and the support it offers at high-cadences could provide a more natural, fluid ride compared to other e-bike systems.


  1. Less Torque: The Performance Line SX offers less torque than some of Bosch's other motors, such as the Performance Line CX and CX Race. For riders who prioritize high-torque for steep hills or challenging terrain, this could be a drawback.
  2. Limit on Assistance: Depending on local laws, the motor may stop providing assistance at speeds over 25 km/h. Some riders, particularly those using e-bikes for high-speed commuting, might find this limiting.
  3. New Technology: As a new release, it's yet to be seen how this motor performs in real-world conditions over time. Early adopters might face unexpected issues or teething problems.
  4. Availability: The first models with the Performance Line SX won't be available until Autumn 2023. Riders eager to enjoy the benefits of this system will need to wait a little longer.
  5. Potential Cost: While the cost hasn't been mentioned explicitly, as a new product with innovative features, it might be more expensive than existing e-bike motors in the market.

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