Torque Sensor vs Cadence Sensor: Which E-Bike Pedal Assist Is Right for You?

If you’ve shopped for an e-bike — or an e-bike conversion kit — you’ve probably run into two terms that sound more technical than they are: torque sensor and cadence sensor. They’re the two ways an electric bike knows you’re pedaling and decides how much help to give you. And the difference between them changes the entire feel of the ride.

Here’s the short version: a torque sensor measures how hard you push on the pedals and scales the motor’s help to match. A cadence sensor just notices that the pedals are turning and switches the motor on at whatever assist level you’ve selected. Neither one is “better” in every situation — but one of them is almost certainly better for you. Let’s get into it.

How a cadence sensor works

A cadence sensor is the simpler of the two. A magnetic disc mounted near your crank sends a signal every time the pedals rotate. The controller sees “the rider is pedaling” and delivers power according to your selected assist level. It doesn’t know or care how hard you’re pushing. Think of it as an on/off switch with a volume knob you set yourself.

What that feels like: you start pedaling, there’s a brief beat, and then the motor kicks in at a steady, preset level of power. It’s predictable and relaxing — great for cruising. On hills or in stop-and-go traffic it can feel a little surge-like, because the motor gives you the same push whether you’re spinning lightly or grinding hard.

The upside: cadence systems are simpler, less expensive, and easy to live with. For commuting, casual riding, and riders who want maximum help with minimum effort, cadence sensing does the job well.

How a torque sensor works

A torque sensor lives in or around the bottom bracket (where your crank arms meet the frame) and measures the actual force you’re putting into the pedals. Push harder, get more assist. Ease off, and the motor backs off with you. The response is proportional and immediate.

What that feels like: it feels like you, only stronger. Starts are smooth instead of surgy. Hills feel flatter because the motor meets your effort instead of replacing it. The bike responds the instant your legs do, which makes the whole ride feel more connected and natural — closer to riding a regular bicycle with really strong legs.

The upside: better control and smoother power delivery. Because assist follows your effort, the motor can avoid unnecessary output in some riding conditions — which can stretch range compared with holding a fixed assist level. But that’s situational, not guaranteed: real-world range still depends heavily on rider input, terrain, load, assist level, speed, and battery capacity. Riders who want exercise, who climb hills, or who just like a bike that feels like a bike tend to prefer torque sensing.

Head-to-head

	Torque sensor	Cadence sensor
Ride feel	Natural, proportional, bike-like	Steady, relaxed, on/off
Starts & stops	Smooth and immediate	Brief lag, then preset power
Hills	Motor matches your effort	Same power regardless of effort
Battery efficiency	Can be better in some conditions — assist follows effort	Fixed output per assist level regardless of effort
Cost	More expensive	Less expensive
Complexity	More involved to install and set up	Simple

Which one should you choose?

Choose cadence sensing if: you mostly commute or cruise, you want the most help for the least effort, you like a simple predictable ride, or you’re keeping the budget down. There’s nothing wrong with cadence sensing — for many riders, its simple and predictable power delivery is exactly what they want.

Choose torque sensing if: you want the ride to feel like a real bicycle, you climb hills, or you’d like assist that scales back when you’re not pushing hard. Trike riders often appreciate it too: on a three-wheeler, smooth proportional starts and controlled power delivery are appealing ride characteristics — a gentle, effort-following takeoff suits the deliberate way trikes get ridden. That said, plenty of trike riders are perfectly happy with cadence sensing, especially for relaxed cruising where steady, predictable help is exactly what’s wanted.

Torque vs cadence on an E-BikeKit conversion

Here’s where it gets practical. E-BikeKit’s current SINET™ conversion systems give you the choice: cadence sensing comes standard, and torque sensing is available as an option on current SINET conversion systems that support the 68mm square-taper torque-sensor configuration — including trike systems like the E-TrikeKit and model-specific kits such as the X3 AX.

A few things worth knowing before you decide:

• The torque sensor needs the right bottom bracket. Our torque-sensor option fits a compatible 68mm square-taper bottom bracket. Installation involves routing the sensor cable through a small, protected hole drilled in the bottom-bracket shell, and you’ll need standard crank and bottom-bracket tools (or a local bike shop — we can help you find one through our dealer locator).
• One-piece cranks need a conversion. Many traditional upright trikes use a one-piece crank, which won’t accept the torque sensor directly. On E-TrikeKit torque-sensor configurations, the torque option is bundled with the crank conversion kit and the required extension cable.
• Cadence isn’t going anywhere. If you’d rather keep it simple, the standard cadence PAS that comes with every SINET system is a proven setup — paired with the thumb throttle and locking e-brake levers for full control.

Not sure which fits your bike or trike? Call us at 1-866-882-3245 (Mon–Fri, 9–5 EST) or email support@ebikekit.com — we’ll talk through your specific setup before you buy.

Frequently asked questions

Can I add a torque sensor to a bike that currently has cadence sensing?

Possibly, but don’t treat it as a simple sensor swap. Compatibility depends on the controller and wiring, the bottom-bracket configuration, and the specific bike or trike. If you already have an E-BikeKit system and want to change from cadence to torque sensing, contact us before ordering parts so we can confirm what your setup requires.

Does a torque sensor really improve range?

It can, in some riding conditions. Because assist scales with your effort, the motor can spend less time at full output than a cadence system delivering fixed preset power — for example when you’re spinning lightly on flat ground. But there’s no guaranteed efficiency gain: real-world range still depends heavily on rider input, terrain, load, assist level, speed, and battery capacity. Our battery-included systems pair with a 48V 15Ah Li-ion pack, and how you ride matters more than which sensor you chose.

Which sensor is better for a trike?

Many trike riders prefer torque sensing for its smooth, effort-following power delivery — gentle starts and controlled, proportional assist suit the deliberate way trikes get ridden. But it’s a ride-feel preference, not a rule: cadence sensing works well on trikes too, particularly for relaxed cruising where you want steady, predictable help.

Do I need any special tools to install the torque sensor option?

You’ll need crank and bottom-bracket removal tools, plus a drill for the small cable-routing hole (we specify a protected 3/8″ hole through the BB shell). If that sounds like more than a Saturday project, a qualified bike shop familiar with e-bike conversions can handle it — and our dealer network installs E-BikeKit systems every day.