The bike is heavily related to the QJ Motor SRK 500 RC, although the key difference is the new bike’s paddle-shift gearbox ...

For 11 years now, German company Pinion's sealed mid-mount gearbox has offered a tougher alternative to derailleurs. It's now been combined with a motor, resulting in a two-in-one ebike module ...

Affordable brushless motors are great for a variety of motion applications, but often require a gearbox to tame their speed. [Michael Rechtin] decided to try his hand at designing a stackable ...

Green Car Reports has information from Polestar that the manufacturer will develop its own powerful in-house electric motor, as well as a two-speed gearbox that doesn’t sound too dissimilar to ...