Bosch has refreshed its Active Line Plus e-bike drive unit for the next generation. The updated system is set to show up first in North America on Trek’s Marlin+, then spread to more 2026 and 2027 models.
Bosch says the new Active Line Plus puts out up to 600 W of peak power, 60 Nm of torque, and 340% pedal assistance. That’s up from the previous 50 Nm, while still keeping the same Class 1-style setup: pedal assist to 20 mph, no throttle.
The hardware changes are a big part of the story. Bosch says a new two-stage gearbox shrinks motor volume by 17%, cuts roughly 1.1 lb, and brings total weight to about 6 lb. That should give bike brands more room to build slimmer e-bikes that look closer to traditional bikes. Bosch is also pointing to specially machined gears, updated sensors, and revised software for quieter, smoother support. On top of that, you get eShift compatibility, better sealing and bearings, and a housing made with about 40% recycled aluminum.
For commuting, fitness rides, or weekend use, this looks like an update worth waiting for once it lands on complete bikes, especially now that lighter, quieter systems are in higher demand and brands are under more pressure to keep pace with rivals like Shimano STEPS.
North American riders will see the Bosch Active Line Plus first on Trek’s Marlin+, paired with Bosch’s new compact controller, display, and higher-energy-density battery. More 2026 and 2027 models are expected after that.
Author: Chema Carvajal Sarabia
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