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Bosch Launches New CX-R Motor, CX Motor Gets More Power & Torque w/ App Update

Bosch launches its most powerful motor to date and offers a free over-air software update to boost the latest Bosch CX motors to match.
Stock image of the new Bosch Performance Line CX-R motor(photo/Bosch)
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The e-bike motor power wars are heating up, whether we like it or not. While most full-power e-MTB motors have been somewhat comparable in terms of power and torque for the past few years, some of the most recent models are kicking things up a notch. The DJI Avinox is a great example with its peak power of 850W and up to 105 Nm of torque. More recently, Specialized debuted its new S-Works 3.1 motor on the Turbo Levo 4, which boasts 720W of power and up to 111 Nm of hill-flattening torque (the standard 3.1 motor drops to 666 W and 101 Nm).

Not to be outdone, Bosch recently announced the launch of an updated Performance Line CX-R motor. With a peak power of 750W and maximum torque of 100 Nm, it’s Bosch’s most powerful eMTB motor yet. Perhaps even more interesting, however, is that starting in July, users can increase the power and torque of the latest Performance Line CX motors to match with a free over-air update through the eBike Flow app.

New Performance Line CX-R Motor

The Kiox 400C display on A bike equipped with the CX-R motor
Race mode is exclusive to the new Performance Line CX-R motor. (photo/Bosch)

The new CX-R motor is the brand’s top-of-the-line model, stepping above the standard CX motor with its stock power, exclusive Race mode, and a lighter weight. The CX-R motor comes standard with a maximum power of 750W, maximum torque of 100 Nm, and assistance up to 400% of pedaling input.

Bosch claims the CX-R motor’s Race mode “enables lag-free accelerations and assist with full power up to maximum speed.” This includes an Extended Boost, giving riders a little extra power when they need it most. The new eMTB+ mode is intended to be dynamic and progressive, adapting power output in relation to rider input. Of course, those modes and Tour+ and eMTB can be tuned to your exact preferences through the easy-to-use eBike Flow app.

By using premium materials like a titanium crank spindle, magnesium housing, and ceramic bearings, the CX-R motor clocks in at just under 6 pounds or 2.7 kg.

Performance Line CX Upgrade

Cory riding up a steep trail on the Merida eOne-Eighty eBike with a Bosch CX motor.
The Merida eOne-Eighty could potentially get the CX motor upgrade. (photo/ Manuel Kleinmann/Merida)

For owners of bikes with the latest Performance Line CX motor (BDU384Y), the upcoming over-the-air update will allow you to increase the power and torque to match the new CX-R motor. With current power at 600W and a max torque of 85 Nm, the increase to 750W and 100 Nm is pretty significant, and you don’t need to buy a new bike to get it.

Of course, riders don’t have to update their motor if they’re already satisfied with its performance and range. And those who do update their CX motor have the ability to adjust the maximum power and torque through the eBike Flow app. Bear in mind that a more powerful motor will burn through the battery more quickly. It is also worth mentioning that Bosch states this update is subject to manufacturer approval, and that the brands will “set the maximum values within which users can adjust their performance values.”

The Performance Line CX update also includes the new eMTB+ mode for “dynamic control.” According to Bosch, “While eMTB mode in the basic setting is optimized for touring and a longer range, eMTB+ mode scores points for performance and trail fun.”

New Bosch Kiox 400C Display

The new Kiox 400C display screen with a plug in the USB-C charging port.
The new Kiox 400C display looks like a huge upgrade over Bosch’s previous top tube integrated units. (photo/Bosch)

Bikes sold with new Performance Line CX and CX-R motors will also include the latest Kiox 400C display. This top-tube integrated screen shows all of your ride data at a glance while reducing handlebar clutter and protecting it from damage. Everything can be customized through integration with the eBike Flow app or the tactile buttons on the display itself. 

Bosch claims the new display is razor-sharp, glare-free, and auto-adjusts brightness based on light conditions. It also includes a USB-C charging port so you can keep your gadgets topped off on the trail.

Other Updates

Bosch also updated its ABS software for the eBike ABS and eBike ABS Pro systems to regulate brake pressure more precisely. Additionally, M+ with eShift will be available in the fall in combination with the TRP E.A.S.I A12 drivetrain. This auto-shift feature will only work with this specific TRP drivetrain.

When Can I Get it?

Bosch states that the first bikes with the new Performance Line CX-R motors are expected to be available in the fall of 2025. The over-air update, however, is expected in July, so eager owners of bikes with the latest Performance Line CX motors don’t have to wait that long for their power boost.

bosch-ebike.com


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Harry
Harry
1 day ago

I’m at a loss why there is no backwards compatibility, I have a v4 CX on a bike which cost 10k, the bike has a life expectancy of at least 10 years and if a new motor was needed then the logical thing to do would be to upgrade to a newer motor especially as with fitting the price would be close 1k but Bosch has made it impossible. The cost to bike manufacturers to redesign their bottom brackets to accommodate the new two bolt motor must be astronomical.

Raymond
Raymond
1 day ago
Reply to  Harry

Bosch does not listen to their customers. If they did the would have provided a Gen 4 CX upgrade to100 nm of torque or even 95 nm. A simple software update. I too spent over $10k (Pivot AM Suttle) just a year ago only to find out they used a motor built version 2022. My bike was purchased in late 2024. I can’t express how disappointed I am now knowing that there is a software upgrade only for the newer version Gen 5 motor. Tired of hearing that 85 nm is enough. I want the option to add torque when I need it.

kris
kris
1 day ago

lack of backwards compatibility means the gen4 is the last bosch motor I’ll ever buy. Intel did the same trick by changing one pin on their cpu’s to sell more motherboards. dji for me from now on.

bill
bill
1 day ago
Reply to  kris

zero guarantee dji will be backward compatible lol.

only tq so far. alsi specialized but they dont sell motors soo..

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