At Eurobike, Rob Rides EMTB tried the Gobao XP1, an e-bike drive unit that packs a motor and an electronic continuously variable transmission into one housing. There is no cassette and no derailleur. Instead of stepped gears, it ramps the ratio continuously to keep your pedaling cadence in a comfortable band, and the host describes the change as feeling like a digital shift rather than the familiar clunk of a chain stepping across cogs. The headline figures, as presented in the video, are 1,500 watts, 150 newton meters, a 3.8 kg unit, and a claimed shift from the lowest to the highest ratio in 0.3 seconds. The host's reaction after riding it was blunt: he said he would buy a bike with this system tomorrow, calling the shifting seamless and the power instant from a standstill.
Most e-bikes pair a mid-motor with a normal chain, cassette and derailleur, which are the parts most prone to wear and damage. Folding the gearing inside the motor removes that vulnerable rear hardware and centralizes weight low and central, which helps a bike handle, a direction much of the e-bike industry has been drifting. For a buyer, two practical things stand out. The bike shown runs a belt drive, which needs far less upkeep than a chain, and the system can be set through an app to behave like a fixed number of gears or as a fully automatic cadence mode with effectively unlimited ratios. The host frames the appeal simply: damaged derailleurs and the clutter hanging off the back of a normal bike are a familiar headache, and an all-in-one unit deletes them. The trade is weight: at 3.8 kg the unit is heavier than a plain mid-drive, though removing the cassette and derailleur claws some of that back at the rear wheel, where it matters most for handling.
The technical explanation comes from Simon of Radiate Engineering and Design, the Swiss firm that built the demo bike. He says the unit holds two motors that work independently, one supplying drive and one responding to the rider's torque and cadence, and together they produce the stepless shift across a 500 percent gear range. The software offers three modes: a continuous cadence control, simulated manual shifts you trigger yourself, and an automatic mode that mimics gear steps so it still feels like shifting. The battery goes up to 900 watt-hours at a claimed energy density of around 240 watt-hours per kilo, which the designer calls among the highest in the bike industry, and the video says it charges to 80 percent in about 20 minutes using a 1.2 kg actively cooled charger. The host says that charging speed, well beyond the hour many fast chargers need, is the kind of jump that changes how you ride, and he repeatedly praises how quiet, smooth and immediate the system feels on the move.
Bottom line: Stepless shifting and a low-maintenance belt drive solve two of the most irritating things about e-bikes, and on a first ride the host was genuinely sold. The caveats are the ones every show-floor product carries: the fast-charge and energy-density numbers were quoted in ideal conditions, and real production bikes, weights and prices are still to come. If the XP1 ships as described, it is the kind of part that could make derailleur e-bikes feel a generation behind, the way internal gearboxes have slowly crept into other categories. The thing to watch now is which bike brands actually build around it, and what an integrated motor-gearbox does to the price of the finished bike once it reaches showrooms, because clever hardware only matters if people can afford the bike it lands on.
Commentary on a third-party video. Figures and claims are as presented in the source and have not been independently verified. Spotted an error? Tell us and we will correct it.