Asus Bike Booster

The reaction was skeptical because the basic engineering compromises are old and well known. Friction drive means lower efficiency than hub or mid-drive systems, more tire wear, less grip in rain or dirt, and generally worse behavior off-road. The product page itself reinforced that concern by limiting water resistance to light rain and ruling out heavy rain, rear fenders, racks, suspension bikes, carbon frames, and some tire types. That knocked out a big chunk of the obvious commuter market, especially in places where everyday bikes are expected to carry bags, kids, or mudguards. It also looked awkward for mountain biking because it adds weight high on the bike, fights with dropper posts and seat position, and still cannot match a purpose-built e-MTB. Where people did see a niche was narrow but real: riders with an existing bike they love, no room for a second bike, and only occasional need for electric assist. The removable battery and detachable unit appealed to people who want to leave a cheap bike outside and carry the expensive bits with them, or who need a bike to stay light and normal most of the time. Even there, commenters thought the product is walking into a crowded market where hub-motor kits, bottom-bracket kits like Bafang, and pricier removable systems like Bimotal or Skarper solve the same problem with fewer obvious compromises. A few side threads mattered. Several people pointed out that cadence-sensor systems feel blunt compared with torque-sensing mid-drives, which is why good factory e-bikes feel far more natural. Others liked the USB-C PD charging because e-bike batteries have been slow to adopt standard charging. There was also a recurring complaint that Asus launched the page without price or availability, which made the whole thing feel more like market testing than a real product launch.