Where should Electrical Bicycle Motor go on your bike?
Front Hub: This process requires replacing a new front wheel with a motor in the center.
Rear Hub: You do a similar swap, but for your rear wheel
Mid-drive: You mount the motor under the pedals.
How will you control the motor?
Your decision depends on what kind of riding you do. Most kits offer three main ways to control how much power your bike's motor provides and when: throttle, cadence sensor, or torque sensor. Some bike kits include throttles and sensors for your choice or combination.
The throttle sounds like: a button, lever or handlebar twist that allows the rider to manually apply power without pedaling. Throttle riding is what you see used by delivery guys in major cities. It uses more power. It's also a useful backup if the bike or rider starts to fail during the ride.
A cadence sensor turns your motor on when you pedal and turns it off when you stop, increasing its output the faster you pedal. It's usually paired with a type of shifter that allows the rider to choose the level of assistance (you'll see this system on most shared-city e-bikes). It's more hands-free than the throttle, but can be a little awkward at low speeds, such as when you're starting from an intersection.
Whether you're climbing a hill or picking up speed, the torque sensor gives you more power when you pedal harder. Torque sensors feel the most natural—they push hard when you push hard—but require more work to install and maintain.