Hi Roly, if I could be of assistance.
There are a lot of differences between the se and Torque bikes.
Please see below an excerpt from our Website FAQs.
What is the difference between SE and Torque bikes?
Our SE and Torque models share exactly the same, Frame, Rack, Batteries, Chain guard, Disc rotors, Stand and Grips
All other parts are different, the main differences are as follows…
705/905se 705/905 Torque
Cadence/Speed Sensor Torque and Cadence/Speed Sensor
Cable Disc Brakes Hydraulic Disc Brakes
Generic Lighting Spaninga High Power Lighting
Wisper Comfort Saddle Selle Royal eBike Saddle
LCD Display Large LCD Centre Display and Large Control Buttons (great when wearing gloves)
High Torque Motor Ultra High Torque Motor
Quiet Running Silent Running
7 Speed freewheel gears 8 Speed cassette gears
Wisper Light Weight Blade forks Suntour NEX SR suspension forks
What’s the difference between cadence/speed and torque sensors?
In Brief
Wisper SE bikes have a cadence (otherwise known as speed) sensor
Wisper Torque bikes have both cadence and torque sensors
Cadence/Speed Sensors
Cadence sensors turn the power on when pedals are turned forward and turn the power off when pedaling stops.
It will take between ¼ and ½ of a complete revolution of the pedals before the power is turned on.
Torque Sensors
Torque sensors recognise when and how much pressure is being put onto either pedal. Power will increase as the pressure on the pedals increases.
Power is available immediately pressure is put onto either pedal.
On Wisper Torque bikes the torque sensor will be deactivated and the cadence sensor will activate when the bike is put into F power mode on the LCD.
The Operation of Wisper SE (Cadence sensor) and Wisper Torque sensor Bikes
Wisper SE
The magnetic disc can be seen on the SE bike, it is a part of the cadence sensor and sits on the inside of the right hand crank by the bottom bracket axle. It simply tells the bike when the pedals are being turned forward at which point the power switches on. When a rider stops pedaling, the magnets stop passing the sensor and the power turns off.
Wisper SE bikes require three magnets to pass the sensor in the correct order (pedals turning forward) before the power is switched on, it then needs magnets to pass by the sensor in quick succession or the power will turn off again. If the pedals stop turning, the bike will recognise this in a small fraction of a second and the power will turn off, hence the reason we do not need vulnerable brake cut outs.
Wisper Torque
On Wisper Torque bikes the torque and cadence sensors are housed inside the bottom bracket where the pedals are connected through the bike frame.
The Wisper Torque system works in a completely different manner to the Wisper SE. Through the torque sensor the system measures the pressure a rider is putting onto the pedals. Pressure on the pedals turns the power on and the torque sensor reads the amount of pressure being exerted. The more pressure a rider puts onto the pedals the more power will be demanded from the motor.
So… if the bike is starting from standstill, encounters a hill, a strong headwind or if the bike is heavily laden, the torque sensor will recognise that more pressure is being put onto the pedals and the bike will offer more powered assistance. It’s very simple and very clever!
Either the left or right pedal will activate the torque sensor.
The torque sensor works in levels 1 – 4 on the handlebar LCD. If you turn the bike onto F, the torque sensor is deactivated and the bike works on cadence sensor alone. The F setting should only used when a rider is on a flat road and needs extra assistance. On a flat road, the rider puts very little pressure onto the pedals, the “torque” sensor recognises this and the bike conserves energy, hence the longer range by up to 40%. So on the flat, should the rider need more assistance they can turn off the torque sensor buy switching to F for FLAT.
I hope this helps!
All the best, David
