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.

With the Performance Line SX, Bosch eBike Systems is setting new standards for sporty riding with lightweight eMTBs, eGravel bikes, and eUrban bikes. The new drive unit combines high performance with low weight – making it the Bosch drive with the highest power density. These features and the finely tuned support ensure a natural riding sensation and enable sporty eBiking on the trail and intensive training rounds on gravel, as well as fast rides through the city.
"Now that most types of bicycle have been electrified, the individual categories are becoming even more diverse. With the new Performance Line SX, we are primarily targeting sporty riders, for whom a low total weight is important for riding fast and experiencing a natural flow," explains Claus Fleischer, CEO of Bosch eBike Systems. "Our goal was to maintain the typical Bosch quality, riding performance and reliability and transfer these to light, agile bikes. With the Performance Line SX, state-of-the-art eBike designs and maximum riding fun can be optimally combined."

New agility in eMountain biking
With a light eMTB, the combination of frame geometry, weight, motor power and battery capacity essentially determines the ride characteristics. Riders of this type of eMTB benefit from the advantages of the Performance Line SX, especially on trails with frequent technical sections and tight bends. The peak power of up to 600W that can be generated at high cadence supports eBikers on steep uphill sections, for example.
On flatter terrain or in downhill sections, the drive unit, which weighs only around two kilograms thanks to its lightweight design and magnesium housing, provides the necessary agility and excels by virtue of its extremely efficient and energy-saving handling. It delivers a maximum torque of 55 Newton metres and a power-to-weight ratio of up to 300 watts per kilogram.
Combined with its sensitive response characteristics, the Performance Line SX enables a very natural riding sensation. When riding with a high pedal power and at a high cadence, riders are rewarded with powerful support. This is supplemented by the perfectly tuned, dynamic-progressive ‘Tour+’ and ‘EMTB’ riding modes, which can be customised using the eBike Flow app.
The energy for trail adventures is provided by the new CompactTube 400 battery, which is also optimally adapted to the Performance Line SX. The lightest battery in the Bosch eBike portfolio that can be integrated into the frame down tube, it also features the highest energy density thanks to innovative cell technology. Weighing only around two kilograms, it has a capacity of 400 watt-hours – more than sufficient for sporty, ambitious riders who put more power into the pedals.
When additional battery power is needed on intense trails, the new PowerMore 250 range extender (approx. 1.6 kilograms, 250 watt hours) increases the range by more than 60 percent in conjunction with the CompactTube 400 - all this with a product the size of a water bottle.

Carefree and dynamic riding with the eGravel bike
Those who love beautiful forest circuits or like to ride an extra mile after a day at the office and place particular value on their fitness can now have a training partner that is precisely tailored to their eGravel bike in the form of the Performance Line SX.
This drive unit supports eBikers when riding with increasing cadence on gravel and asphalt. The feel is as natural as a conventional gravel bike – the difference being that the drive adds that extra fun factor to riding on gravel. Even above 25 km/h, eBikes equipped with the SX are particularly smooth and easy to ride, and the pedal resistance has been reduced by more than 50% compared to other Bosch drive units and is therefore barely noticeable.
To match the new drive unit, Bosch eBike Systems has developed the progressive ‘Sprint’ riding mode, which is shown as ‘SPRNT’ in the display. This helps eGravel bikers to quickly reach and maintain a high speed. On high-cadence sections the new riding mode supports them disproportionately to their own power: the faster the eBiker pedals, the higher the level of support.
Also new and optimised to eGravel bikes is the small Mini Remote Dropbar control unit, which can be mounted onto dropbar handlebars (31.8 millimetre diameter), to the left of the stem.
In conjunction with the System Controller and the CompactTube 400, the lightweight components reduce the weight of the entire system to around four kilograms. Bosch recommends the Kiox 300 as a suitable display for showing riding and performance data.

Get from A to B quickly, elegantly and easily with the eUrban bike
Whether commuting to the office or riding to the café, as a drive for modern eUrban bikes the Performance Line SX helps riders to progress dynamically and efficiently in urban traffic naturally and with the agility of a conventional bike, but with powerful support as soon as higher speeds are required. This makes rapid acceleration effortless – and not only at traffic lights.
It interacts perfectly with the CompactTube 400 and the Mini Remote and System Controller operating and control units. This enables a low total weight of the eBike – an advantage when users have to carry the bike up or down stairs. With its low volume, the drive unit fits seamlessly into the sleek look of modern eUrban bikes. Thanks to the narrow crankset it's barely noticeable in the area of the bottom bracket.

Technical refinements for a particularly natural riding sensation
In addition to the specific advantages of the Performance Line SX for light eMTBs, eGravel bikes and eUrban bikes, the new drive unit delivers further optimisations across all areas of application. These include, for example, the innovative, very low-noise motor and gearbox concept. Thanks to a new sealing concept and narrow cranks (Q factor: 160 mm) the pedal resistance is barely noticeable, making the eBike experience even more pleasant.
The first models with the Performance Line SX are expected to be available on the market from Autumn 2023.