This Tongsheng/SFM mid drive motor with torque sensor is the cheapest and good torque sensor mid drive motor in china, you can feel the power from your foot to start the ebike,so you can't need use throttle to start the ebike

TSDZ2 electric bicycle central mid motor with torque sensor

Speed: 15Km/H-45Km/H    top speed 45km/H

Package include:

1.48V 500W 750W 18A TSDZ2 mid drive motor with torque sensor throttle e-brake lever

2.e-brake lever

3.Speed sensor with magnets

4:with throttle

5.E-bus cable set(can compatible till 28inch bike)

6.Easy installtion as 8FUN center motor

7.42T chainwheel

8.VLCD5-display also has a usb port, to charge your mobile device

9.pecial speed sensors, which are more robust, and include a split 'Y' adapter, to hook up a 6V headlight, and 6V taillight, which you can control from the display

10.Supports up to 54.6V input voltage, can't work on 58.4 input voltage ,without brand on the motor, this motor can't working on XH- 18 LCD display, Controller max current 48V 15A

12.1 * Battery Charger (Optional-EU Plug)

Why doesn't thumb throttle work?

An：you must install motor on bike, then ride ebike, the thumb throttle just works after motor run

How do I know if this mid drive motor fits for my bike?

This mid drive motor desighed to fit bike with a 68mm (2.68inch) or 73mm (2.87inch) wide bottom bracket. The inner diamater of the bracket should be not less than 33.5mm. We will send extra washers and bolts for 73mm bottom bracket.

After installing the motor:

If mechanical collisions happened between motor and frame, Add gaskets,We will send extra 1pcs 42*35*1.0 and1pcs 42*35*1.5 gaskets.If you do not add gaskets, It is easy crack the shell and destroy torque sensor.Speed sensor:Tighten with cable tie,Keeping distance between 10mm to 15mm,The arrow align at magnet.

After installing Note:

The motor does not work when the mid motor TSDZ2 is no-load;If the matching display’s model is XH18-LCD, rotating the throttle is only for Power assist shift.Do not tough the pedals when turing on the display power.

48V 15AH/20AH Specification: (the interior battery is SAMSUNG INR21700-50E 21700 Li-ion battery)

48V 12.5AH Specification:  (the interior battery 18650 battery cells (china battery cells)

48V 13AH HAILONG G70 Specification:  (the interior battery is LG Li-ion battery)

48V 17.5AH HAILONG G70 Specification: (the interior battery is LG INR18650MJ1 or SAMSUNG INR18650-35E3 Li-ion battery)

HAILONG PLUS 48V 17.5AH Specification: (the interior battery is LG INR18650MJ1 or SAMSUNG INR18650-35E3 Li-ion battery)

5. Continuous discharge current: 30A
6. Pulse/Max discharge current 50A
7. Max charging current : 5A
8. Charging temperature: 0~45°C
9. Dischargeing temperature: -20~55 °C
10.Operating voltage:36.4V~54.6V
11.Diamesion: Please refer to the option picture for battery size
12.Weight of battery pack About kg

Motor Warranty:

1 year (based on the purchase data): Free repair,buyer pay for return postage and resend postage, buyer should return to Italy for repair, don't need return to china.

Battery Warranty:
12 month (based on the purchase data): Free repair ,buyer pay for return postage, Free for resend postage, buyer should return to Germany for repair, do not need return to china.
If battery cannot be repaired, Buyer should bear the depreciation fee, which is calculated at five percent per month.

ATTENTION:
Must charge the battery to fully power at once after received parcel, Must charge the battery to fully power immediately when the battery out of power
If this battery is to be stored for more than two months please charge for this for three hours every two months of storage and turn off the switch of battery.
Do not connect the positive and negative terminals of battery
Do not expose this battery to high temperature such as heating appliances or in direct sunlight
Do not submerge this battery in liquid of any kind
WARNING Disassemble only by the professionals
Do store in a cool dry area out of direct sunlight
Do not use any other charger for the one supplies with this battery
When this battery is no longer of use please dispose of correctly by returning your supplier or recognized battery collection disposal point.
Do not dispose of this battery with your household waste