The Extended Boost increases trail performance on difficult passages and, thanks to the enhanced eMTB mode, the acceleration behavior on rough surfaces is noticeably more sensitive. Thanks to the perfect coordination of software and sensors, the powerful, highly efficient CX drive unit makes the most of its advantages and offers e-mountain bikers an incomparable riding experience.

Mastering demanding riding situations

As the benchmark in the E-MTB sector, the Performance Line CX stands for pure riding pleasure on trails. This includes being able to accelerate quickly and powerfully even at low cadences or to start off on steep trails. With the torque increased to a maximum of 85 Newton meters in eMTB and Turbo mode, this is now even easier. The performance upgrade delivers full power over a wide cadence range. "This makes it easier to master unpredictable riding situations", explains Claus Fleischer, Managing Director of Bosch eBike Systems. "Delayed gear changes, for example, are better compensated for and accelerating out of tight bends is much more powerful and dynamic." Even in difficult gears, e-mountain bikers immediately have more power at their disposal. What's more, the riding experience remains absolutely natural and smooth, even when pedaling and in turbo mode.

Feel the flow in a wide cadence range

In eMTB mode, the motor assistance adapts progressively to the eBiker's individual riding style depending on the pedal pressure. The software update also includes eMTB mode and refines it. New sensor and motor control functions now provide even more dynamic and natural assistance in an extended cadence range. Claus Fleischer explains: "The newly tuned eMTB mode noticeably improves handling on the trail once again. The traction control increases, the acceleration behavior is much finer and more sensitive, especially in low gears." In line with the increased torque, the Drive Unit supports a wider cadence range and the eMTB mode delivers the right power at all times - for the ultimate flow.

Smoothly roll over obstacles

The Extended Boost ensures improved performance on challenging trail sections. This allows bikers to roll smoothly over roots, steps and stones, even on uphill sections: By applying situational pressure to the pedal, the system reacts in fractions of a second and provides the decisive boost to roll over an obstacle. This allows the E-MTB to move easily and agilely through technically tricky sections. The Extended Boost makes pedal management easier and ensures that there are hardly any pedal bumps. The function is used in eMTB mode and is easy to control in all riding situations.

The software update can be installed by specialist dealers from summer 2020 and is available for all E-Bikes with Performance Line CX from model year 2020.

First Ride: Bosch Performance Line CX software update

Ride has already had the opportunity to ride a Trek Rail with the new software. The test lap was ridden beforehand with the existing version and then with the update. This gave us a good impression of the improvements.

Bosch doesn't promise too much, the new features are clearly noticeable and they optimize the E-MTB mode. If you're a sporty rider who used to regularly use the turbo setting, you now only need it at the start of steep climbs to get up to speed quickly. At very high cadences and corresponding pedal pressure, both modes provide the same amount of support. But in the lower speed range, there are clear differences.

The power increase of 10 Newton meters gives the E-MTB mode more liveliness, the better acceleration is clearly noticeable. As BMW once said so beautifully in their brand slogan? "Power is nothing without control." And this also applies to electric motors. The algorithms now regulate the power better on rough terrain or loose surfaces. The rear wheel hardly spins any more. Even if you're sprinting up a steep gravel path at full power, you always have good traction. You have to lean very hard over the handlebars to lose it. But nobody pedals like that.

If you ride uphill in a gear that is too tight or try to accelerate out of a very tight corner, it works better than before. And without having to shift under full load and without almost breaking the chain. Understandably, this only works if you are one or two gears off the ideal ratio. The drive can't perform miracles either: If you have completely shifted, you have to get off the bike and push or simply engage the right gear by the skin of your teeth.

Another advantage is that you can ride up steep sections much more slowly and get the right support. This helps a lot when you have to maneuver around tight bends on the uphill or when steps make the ride more difficult. The motor gently "pushes" you along.

Conclusion: The Bosch Performance Line CX is currently one of the most powerful motors on the market and the software update not only provides more power, but also much better handling. Beginners and advanced riders alike benefit from this and the e-bike riding experience comes very close to classic biking. Bosch owners are well advised to have the update installed by their specialist dealer.

www.bosch-ebike.de/performance-cx