Product Manual—Mid-Drive Conversion Motor

1 General Introduction

1.1 Safety

⚠️ Read and understand all safety warnings and instructions. Failure to comply with the following warnings may result in death or serious injury:

• Do not attempt to change, especially increase, the power or maximum power of the motor, as well as the speed it supports. Doing so may put yourself and others in danger, and you may also violate legal regulations.
• Do not open the motor body by yourself. The motor can only be repaired by professional technicians using original spare parts to ensure the safety of the motor. Unauthorized opening of the motor will render the warranty or claim invalid.

1.2 Application

Diagram showing a standard bicycle transforming into an e-bike by adding the TSDZ2B motor.

1.3 Scope of Application

The TSDZ2B mid-drive conversion motor can convert your regular bike into an electric power assisted bike (e-bike). The TSDZ2B is suitable for bikes with a bottom bracket (BB) length of 68mm or 73mm.

Illustrations of bicycle bottom brackets, indicating compatibility with 68mm and 73mm lengths.

Note: Before buying the motor, use the provided measuring tool to determine if your bicycle size is compatible. Visit the following page to find the "Download" button in the "Conversion Kit" section, print it out on A4 paper, and follow the steps in the document or video to ensure your bicycle is compatible.

Measuring tools Download Link: https://cn.tongsheng-e.com/companyfile/7.html

Video of Measuring: You can scan or click the QR code to watch the video.

1.4 Product Features

• Easy to install and suitable for most bicycles.
• The maximum torque is around 140N.m, with strong climbing ability.
• Integrated controller and torque sensor on both sides.
• Compact appearance and weighing approximately 4.8Kg.
• Smooth riding, high efficiency to extending the riding range.
• Modular component design for easy maintenance.

2 Parameter

2.1 Appearance

Three views of the TSDZ2B motor: side, rear, and front with chainring.

2.2 Specification

Except for the TSDZ2B standard, there are some options available:

• Option-1: Rated Power: 350W
• Option-2: Rated Voltage: 24V

(Please consult the sales staff for more details on the options)

2.3 Mechanical Composition

Exploded view of the TSDZ2B motor components, listing parts like Motor Core, Controller, Clutch Gear, Reduction Gear, etc.

3 Motor Parts and Installation Tools

3.1 Motor Parts List

3.2 Installation Tools List

4 Installation

4.1 Motor Installation

1. Push the center shaft of the TSDZ2B motor through the bottom bracket of your bike. Ensure the exposed shaft length is no less than 10mm.
2. Ensure the motor flange does not touch the bike frame. If it does, use 1-3 washers to create necessary space between the motor flange and the bike frame.
3. Use the "fixing plate washers" and "fixing plate screws" to attach the "fixing plate" to the bottom bracket. Tighten them with the hexagonal wrench, but do not fully tighten them yet; leave some gap.
4. Place the "locking nut" onto the bottom bracket. Tighten the locking nut by hand with a locking wrench, but do not tighten it completely. The motor should still be twistable by hand.
5. Install the fixing block on the bike frame, but do not fully tighten the screws. The motor should still be twistable by hand.
6. Drag the motor towards the front wheel with your hand, then tighten the locking nut with the locking wrench. The locking torque should be 50~60N.m. The motor should no longer be twistable by hand.
7. Tighten the fixing plate screws completely using the hexagonal wrench.
8. Tighten the fixing block screws completely using the hexagonal wrench.
9. Assemble the cranks. Tighten the crank screws with the M8 hexagonal wrench. The locking torque should be 35-40N.m. Note: Pay attention to the left and right markings on the crank arm. Do not assemble the left or right crank at the wrong position, as this may cause personal injury.

4.2 Kits Installation and Connection

Diagram illustrating the integration of the TSDZ2B motor, display, speed sensor, and throttle onto a bicycle frame.

4.2.1 Speed Sensor Installation

Fix the speed sensor at the chain stay using a ribbon. Assemble the magnetic button onto a spoke of the rear wheel and align it with the triangle symbol 'A' on the sensor. Adjust the distance between the sensor and the magnetic button to 10~15mm.

4.2.2 Display Press-button and Throttle Installation

Parts and Tools List:

Standard Package includes: Display, Press-button, Throttle, Ribbons. Self-provided tools include: Hexagonal Wrench Kit, Combination Pliers.

1. Display Installation: Remove the two screws from the display mount using an M3 hexagonal wrench. Fix the display onto the middle of the handlebar and tighten the screws.
2. Press-button Installation: Remove the screw from the button and attach the button to the left handlebar. Tighten the screw completely. Connect the button's plug wire to the display's plug wire.
3. Throttle Installation: Loosen the screw on the throttle. Fix the throttle onto the right handlebar by tightening the screw completely. Connect the throttle wire to the middle socket at the back of the display.

4.2.3 Connection

Wiring of the motor and display: [Description of wiring connections]

Wiring of the motor and speed sensor: [Description of wiring connections]

Wiring of the motor and battery: [Description of wiring connections]

5 Maintenance Video of The Motor Parts

5.1 Clutch Gear Replacement

Video of Clutch Gear Replacing: Scan or click the QR code to watch the video.

5.2 Reduction Gear Replacement

Video of Reduction Gear Replacing: Scan or click the QR code to watch the video.

5.3 Torque Sensor Replacement

Video of Torque Sensor Replacing: Scan or click the QR code to watch the video.

6 Packing

6.1 Standard Packing - Without Logo (Default)

This standard packing without a logo will be used by default if no specific packing is indicated in the order. Dimensions: 250mm x 230mm x 250mm.

6.2 Standard Packing - With Logo

Please indicate "Standard Packing with Logo" in the order if you choose this packing. Dimensions: 250mm x 230mm x 250mm.

6.3 Customized Packaging

The first layer of packaging for this motor can be customized. The cost of customized packaging is not included in the quotation of standard products and needs to be calculated separately based on actual customized requirements. The scope of customized packaging includes:

• Printing other content on the default packing.
• Packaging of other sizes or appearances.

6.4 Packing Materials and Norm

• Packing Materials: Carton packaging made with environmentally friendly, energy-saving, and recyclable materials.
• Packing Norm: Motor of 1pc/carton (referring to the first layer packaging of the motor).

7 Usage and Storage Conditions

7.1 Normal Using Condition

• Environmental temperature: -15 °C to 40 °C
• Relative humidity: ≤ 95%
• Atmospheric pressure: 86KPa-106KPa

7.2 Storage Condition

The motor should be stored in a clean and well-ventilated warehouse with no corrosive gases in the air.

• Environmental temperature: 0 °C~35 °C
• Relative humidity: ≤ 85%