Torque Sensors vs Cadence Sensors on eBikes in 2025: What’s the Difference?
If you’re comparing eBikes in 2025, you’ll quickly notice the terms torque sensor and cadence sensor everywhere. Both systems control pedal assist (PAS), but the ride experience is dramatically different depending on which one your bike uses.
This guide breaks down the real-world differences, explains which type is right for your riding style, and highlights which Biktrix models use torque sensors vs cadence sensors so you can choose confidently.
What Is Pedal Assist (PAS)?
Pedal Assist (PAS) is the system that determines how much power your eBike gives you when you pedal. Instead of relying only on the throttle, PAS uses sensors near the pedals to measure your movement and translate it into motor assistance.
Biktrix uses two major PAS technologies:
- Cadence sensors
- Torque sensors
Electrek does a great article documenting the differences between the two drive systems here.
What Is a Cadence Sensor?
A cadence sensor detects whether you are pedalling and how fast the pedals are turning. Once you start rotating the cranks, the motor applies a preset amount of power based on your chosen PAS level.
How a Cadence Sensor Feels
- Power comes on like an on/off switch.
- The bike provides boost even if you apply minimal force.
- Great for riders who want an easy and relaxed ride.
Pros of Cadence Sensors
- Most affordable PAS option.
- Very easy to use for casual riders.
- Effortless cruising on flatter terrain.
- Great if may have physical limitations preventing heavy pedalling.
Cons of Cadence Sensors
- Less natural ride feel.
- Slight delay when starting from a stop.
- Requires manual PAS adjustments on steep hills.
Biktrix Models With Cadence Sensors
These bikes are ideal for riders who prefer simple, set-it-and-forget-it pedal assist.
What Is a Torque Sensor?
A torque sensor measures how hard you push on the pedals—not just the fact that you are pedalling. The harder you push, the more assistance the motor provides. This creates a very intuitive, natural-feeling ride.
How a Torque Sensor Feels
- Ultra-smooth, proportional assistance.
- Instant response when starting from a stop.
- Feels like “bionic legs” rather than a motor kicking in.
Pros of Torque Sensors
- Most natural riding experience.
- Ideal for hills and stop-and-go city traffic.
- Often improves real-world range.
Cons of Torque Sensors
- More expensive technology.
- Requires at least some pedaling effort.
Biktrix Models With Torque or Torque+Cadence Sensors
- Juggernaut Ultra FS Pro 3 — Torque + Cadence
- Juggernaut Hub Duo 52V — Torque + Cadence
- Swift X 2 — Torque + Cadence
- Swift CVT 2 — Torque + Cadence
These models offer superior control, smoothing out climbs and improving responsiveness.
Torque vs Cadence: Real-World Comparison
1. Starting From a Stop
Cadence: Slight delay before the motor engages.
Torque: Instant response as soon as you apply pressure.
2. Climbing Hills
Cadence: Power can feel either too strong or too weak unless you change PAS levels.
Torque: Smooth, proportional power that matches your effort—perfect for steep terrain.
3. Riding With Friends
Cadence: Harder to fine-tune speed.
Torque: Easy to match others’ pace through pedal pressure alone.
4. Fitness & Effort
Cadence: Lower effort, you just need to rotate pedals.
Torque: Better for riders who want a natural, fitness-oriented experience.
Which Sensor Type Should You Choose in 2025?
Choose a Cadence Sensor If:
- You want the most affordable eBike option.
- You ride on mostly flat paths.
- You prefer effortless cruising without pushing hard.
Choose a Torque Sensor If:
- You ride hills or carry heavier loads.
- You want the most natural, bike-like feel.
- You want smoother control in traffic or on technical terrain.
Still Not Sure Which Sensor Is Right for You?
Try both systems and feel the difference in person. Book a test ride or explore the full range of Biktrix models below: