Bosch calls the all-new CX-R its highest high quality ebike drive unit so far, excessive self-praise from one of many world’s largest ebike drive suppliers. The brand new magnesium-housed motor cranks torque and energy to the highest of the lineup and provides a brand new prime pace “race” mode for getting fired up on all cylinders in a rush. It’d simply encourage a brand new era of quick, absolutely adrenalized electrical mountain biking.
Bosch’s new Efficiency Line CX-R drive picks up the place the Efficiency Line CX leaves off, growing peak energy from a 600-W ceiling to a full 750 watts. Torque will get boosted from 85 to 100 Nm (74 lb-ft), whereas most help degree rises to 400 p.c, a goal Bosch set with steep technical hills in thoughts.
The CX-R motor weighs in over 3 oz lower than the usual CX at an excellent 6 lb (2.7 kg), due to its mixture of powder-coated magnesium shell, corrosion-resistant titanium crank spindle, and ceramic ball bearings.
The brand new CX-R earns its “R” with an unique Race mode that directs full motor energy into all-out lag-free acceleration, proper as much as prime pace and/or 400% help degree. Race mode additionally extends time on the built-in enhance perform that will increase output to assist the rider energy over and thru massive obstacles, comparable to an outsized rock backyard or tangled net of tall, slick tree roots. It guarantees to show brief hike-a-bike jaunts into simply one other a part of the trip.
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A brand new eMTB+ mode primarily splits the distinction between the prevailing range-optimizing eMTB mode and all-out Race help. It really works to harness the brand new ranges of energy and torque extra naturally into the using curve, responding consistent with adjustments within the rider’s personal energy and cadence. A pair of built-in sensors measures pedal enter 1,000 instances per second to make sure rapid drive response the rider would not even discover past the general smoother efficiency.
Riders also can fine-tune Trip and eMTB+ settings in Bosch’s eBike Circulation app. To raised illustrate how this works, certainly one of Bosch’s latest videos exhibits stuntman-level professional mountain biker Danny MacAskill dial torque and energy as much as most with the intention to navigate a very tight switchback. The additional oomph helps him muscle up a brief, steep rock stack after coming to a digital cease on a hop-turn. Rising output on-demand helps on this case to grind by way of a brief however tough momentum-sapping stretch that will in any other case require hopping off and strolling. It could possibly then be dialed again to assist lengthen battery life and vary.
“The brand new eMTB+ using mode brings the ability of the CX-R to the path in a managed method,” explains Claus Fleischer, CEO of Bosch eBike Techniques. “Because of Dynamic Management – a sort of traction management within the new mode – propulsion stays managed even on demanding terrain, steep sections and moist surfaces.”

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The CX-R additionally comes with the brand new Kiox 400C, a prime tube-integrated show that auto-adjusts to ambient gentle and in addition adjusts the info proven based mostly on using state of affairs. As an illustration, an information set that features elevation is displayed when pedaling uphill, switched to a speed-focused show on the best way down. In fact, riders have the final say in what information they’re and may both regulate settings forward of time within the eBike Circulation app or on-the-fly with the bodily buttons on the display or handlebar distant.
No pricing simply but, because the CX-R mid-drive will come instantly with OEM ebikes constructed round it. Bosch expects the primary of these to hit the market in Fall 2025. We’ll hold a watch out for the primary CX-R bike debuts when Eurobike will get underway in late June for a greater concept of how the boosted CX-R specs will have an effect on numbers like vary and battery life.
Excellent news for present Efficiency Line CX homeowners, who needn’t seethe with envy: Bosch additionally introduced this week that the newest Efficiency Line CX motor (BDU384Y) shall be upgradable to the CX-R’s 750-W/100-Nm/400% stat line through an OTA eBike Circulation app replace. It will not obtain the CX-R-exclusive Race mode however will get the eBike+ mode.
The catch? The person bike producer has to approve the over-the-air replace forward of the July rollout. Every producer serves as the ultimate authority on specs and updates, however we won’t think about many eMTB builders falling behind the pack by not approving a efficiency enhance that is sitting on the market like luxurious, low-dangling fruit.
We’re typically massive proponents of conventional non-electric pedaling, however watching movies like Bosch’s CX-R promo all the time makes us wish to give just a few eMTBs an intensive long-term shakedown.
Efficiency Line CX-R | Extraordinary. Developed with professionals.
Supply: Bosch