Here’s a simple breakdown of the two options:
A torque sensor checks how hard you're pedaling. It senses the pressure or force you put on the pedals. The harder you push, the more help the motor gives you. It’s kind of like the bike “feels” your effort and gives you a boost based on how strong you’re pedaling. This setup is more responsive and feels more natural because it’s tied to your pedaling power.
A cadence sensor, on the other hand, looks at how fast you're pedaling. It counts how many times your pedals spin in a minute (your pedal speed). The motor helps out based on your pedal speed, no matter how hard you're actually pushing. It’s like the bike gives you a hand as long as you’re pedaling, even if you're not putting in much effort.This might feel a little less connected to your effort, but it’s great for keeping a steady pace without having to push too hard.
In short, the main difference is what they focus on: torque sensors respond to how hard you’re pedaling, while cadence sensors respond to how fast you’re pedaling. Some e-bikes even use both for a smoother, more natural ride.