Imagine you're leaving home for work on a Monday morning.
You press down on the pedals as you leave the traffic light. Instead of waiting for the motor to suddenly kick in, the bike seems to understand exactly how much assistance you need. You push harder, and the motor responds. You ease off, and the assistance follows.
Now imagine the opposite experience.
You start pedalling, the motor activates, and suddenly you feel a noticeable push from behind. You slow down slightly, but the assistance continues at almost the same level until the system detects another change.
Both bikes are electric. Both can get you to work. But they can feel completely different.
The difference often comes down to one small component: the pedal-assist sensor.
How Do Torque and Cadence Sensors Work?
The easiest way to understand the difference is to think about what each sensor is measuring.
A cadence sensor detects pedal rotation. When you start pedalling, the system knows that you are riding and activates the motor according to your selected assistance level.
A torque sensor measures the force you apply to the pedals. If you push harder, the system can respond with more assistance. If you ease off, the assistance can decrease.
In simple terms:
Cadence sensor: "Are you pedalling?"
Torque sensor: "How hard are you pedalling?"
This difference can change how an e-bike feels.
Cadence-based assistance can be straightforward and comfortable, especially if you want the motor to do more of the work. Torque sensing, meanwhile, can provide a more proportional response to your own effort.
According to Gazelle, torque sensors measure how hard the rider pedals, while cadence sensors detect pedal movement. The two approaches therefore create different pedal-assistance characteristics.
For city commuters, the difference becomes particularly noticeable when your speed and effort are constantly changing.
Which Sensor Feels Better in City Traffic?
For occasional recreational riding, the difference may not be a priority.
But when you're commuting several days a week, small details can become much more noticeable.
Starting and Stopping
Urban riding involves plenty of traffic lights, crossings and intersections.
With a cadence-based system, assistance is triggered when the system detects pedal movement. With torque sensing, your pedalling force also becomes part of the input.
This can make acceleration feel more connected to your own movement.
You don't have to think about the technology. You simply pedal harder when you want more assistance.
Riding Uphill
Hills are another situation where torque sensing can be useful.
As the road becomes steeper, you naturally apply more force to the pedals. A torque sensor can detect this increased effort and adjust assistance accordingly.
The motor isn't necessarily producing more maximum power. Instead, the available assistance is being delivered in response to what you are doing.
For a commuter riding through a city with bridges, slopes or longer climbs, this can create a more predictable and natural riding experience.
Stop-and-Go Commuting
A typical urban route rarely has a constant speed.
You accelerate, brake, turn, stop and start again.
Torque sensing is well suited to this kind of riding because the system responds to changes in your pedalling effort rather than simply detecting that the pedals are turning.
That's one reason torque sensors are often associated with a more natural cycling feel.
Is a Torque Sensor Better for Commuters?
There isn't one sensor that's perfect for everyone.
Your choice should depend on how you intend to use your e-bike.
A cadence sensor can be a practical choice if you mainly want simple, consistent assistance and don't mind the motor doing more of the work.
A torque sensor is worth considering if you:
- Ride frequently
- Commute through busy urban areas
- Encounter hills
- Want smoother acceleration
- Prefer to remain actively involved in riding
- Want assistance that responds to your effort
For someone riding to work five days a week, these differences can add up.
You're not evaluating the bike based on one ride. You're experiencing the same system hundreds of times throughout the year.
That makes the quality of the riding experience increasingly important.
Why the Complete E-Bike Matters More Than One Specification
Choosing an e-bike isn't simply about choosing the best sensor.
The motor, controller, battery, brakes, frame and drivetrain all influence the final riding experience.
For example, a responsive sensor doesn't make a heavy bike easier to carry upstairs. Likewise, a powerful motor doesn't eliminate the need for reliable braking or a low-maintenance drivetrain.
This is why it's useful to look at the e-bike as a complete system.
Weight and Everyday Usability
Consider what happens when the motor isn't helping.
You may need to carry your bike up apartment stairs, move it into an elevator or lift it onto a bike rack.
The AMANO S900 weighs 19.5kg, making it relatively lightweight for a fully equipped urban e-bike.
That matters because you interact with the bike even when you're not riding it.
For more on this topic, see our guide to why e-bike weight matters for daily commuters.
A Low-Maintenance Drivetrain
The drivetrain also affects everyday ownership.
The AMANO S900 uses a Gates Carbon Drive belt system, which doesn't require conventional chain lubrication.
Gates recommends keeping its Carbon Drive system clean and correctly aligned rather than lubricating it.
For a daily commuter, that means less grease, less cleaning and fewer routine maintenance tasks.
You can learn more about the differences in our guide to belt drive vs chain drive on e-bikes.
How the AMANO S900 Uses Torque Sensing
This is where the technology becomes relevant to a real product.
The AMANO S900 combines a 250W AMANO S9 motor with 45Nm of torque and a high-precision torque sensor designed to respond quickly to changes in rider input.
The bike also uses a 36V 10Ah Samsung battery and weighs 19.5kg.
The goal isn't simply to maximise the numbers on the specification sheet.
Instead, the system is designed around a simple idea: you provide the input, and the bike provides assistance that matches it.
Imagine riding through Berlin on your morning commute.
You leave a traffic light, accelerate, slow down for a cyclist, then reach a short uphill section. Your pedalling effort changes throughout the journey, and the torque-sensing system is designed to respond to those changes.
At the end of the day, you still have to take the bike home.
That's where the S900's lightweight frame and low-maintenance belt drive become just as relevant as its sensor technology.
You can see the full AMANO S900 specifications before deciding whether its configuration fits your daily commute.
What Should You Look for When Buying an E-Bike?
Don't choose an e-bike based on one specification alone.
Instead, ask yourself three questions.
How do I ride?
If you ride mainly on flat roads at a relaxed pace, a cadence sensor may provide everything you need. If you commute frequently and want a more responsive riding experience, torque sensing may be more attractive.
What does my route look like?
Traffic lights, hills, frequent stops and changing speeds make responsive pedal assistance more valuable.
What happens when I'm not riding?
Weight, drivetrain maintenance, storage and carrying convenience are all part of everyday ownership.
A good commuter e-bike should work not only on the road, but also in your apartment, office, bike storage area and daily routine.
FAQ
-
Is a torque sensor better than a cadence sensor?
Not for every rider. Torque sensors generally provide assistance that responds more closely to your pedalling effort, while cadence sensors offer simpler pedal-activated assistance. -
Do torque sensors make e-bikes feel more natural?
They can. Because the system responds to how hard you pedal, assistance can feel more closely connected to your own effort. -
Are torque sensors worth paying more for?
For frequent commuters, they can be. If you ride several days a week and care about smooth acceleration and responsive assistance, the difference can become noticeable over time. -
Does an e-bike need both sensors?
No. E-bikes can use torque sensing, cadence sensing or a combination of both. What matters most is how well the overall system works for your riding style.
Final Thoughts
When comparing e-bikes, it's easy to focus on motor power, battery capacity and top speed.
But the way the bike responds to you can be just as important.
A torque sensor can provide more responsive assistance, while factors such as weight and drivetrain design influence how practical the bike is to live with every day.
If you want to explore a lightweight urban e-bike built around responsive pedal assistance and low-maintenance components, take a look at the AMANO S900 electric bike.
The best e-bike isn't necessarily the one with the biggest numbers. It's the one that fits naturally into the way you actually ride.
