The power of evolution. With the powerful Bosch CX motor, an integrated 800 Wh battery, a clear Kiox 300 display, and twelve smooth-shifting Shimano XT gears, the Reaction Hybrid SLX 800 is ready for any route. The high-quality, air-sprung Fox 34 AWL suspension fork with 120 millimeters travel ensures grip, control, and comfort across any terrain. The dropper seatpost is not only practical on challenging trails, allowing you to easily lower the saddle for extra control, but it also makes mounting and dismounting easier. And if things unexpectedly get too fast, you can rely on the extra-powerful Shimano XT four-piston brakes and the grippy 2.6 inch wide Smart Sam tires from Schwalbe. What route will you ride this weekend?
A significant performance boost for compatible CUBE bikes fitted with selected BDU38 Performance Line motors will be available from 4 May 2026. The upgrade is available simply by using the Bosch eBike Flow App. No other action is needed.
After downloading Performance Update 2.0 via the eBike Flow app, you can now choose to increase these peak values up to 120Nm torque , 600% support and 750 watts, with peak power also available for longer periods depending on riding conditions.
Maximum rider support of up to 600% is limited to speeds between 0 and 15km/h (this doesn't affect the speed limit of 25km/h for pedal assistance, which remains the same). Some trekking and city bikes equipped with hub gears may have lower performance increases to remain within manufacturer recommendations.
More boost. More precise control. Performance, redefined.
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