Rubbee consists of a polyurethane roller wired to a 14.4-volt battery pack. The doohickey presses the roller against the back tire of the bike, propelling it with the force of wheel-on-wheel friction ...

[Tom Stanton] wanted to see if supercaps have any practical use on e-bikes, and built a DIY electric motor in the process. One of the problems with supercaps is the rapid voltage drop during ...

Sixthreezero’s wide range of electric ... bike is rated to carry up to 350 lb (159 kg), and the 750W motor ensures it has the power to do so. With speeds of up to 20 mph (32 km/h), the quad ...

Fiido X <a href="https://www.fiido.com/products/fiido-x-folding-electric-bike#011-1">https://www.fiido.com/products/fiido-x-folding-electric-bike#011-1</a> Fiido ...