Replace a stripped, cracked, slipping, or noisy first-stage reduction gear in a compatible Tongsheng mid-drive motor. Select the option that matches the internal design of your TSDZ2 or TSDZ2B motor.
Before You Order
- Do not select by motor voltage, power rating, or gear color alone. Confirm whether your motor is TSDZ2 or TSDZ2B.
- Open the motor and compare the gear structure, shaft design, teeth, and bearing arrangement with the product photos.
- The earlier TSDZ2 and TSDZ2B use different reduction assemblies and should not be treated as interchangeable options.
- The blue nylon gear normally runs quieter. The brass option may produce more mechanical gear noise.
- Only the selected gear option is included. Grease, motor covers, tools, seals, and other motor parts are not included.
- If the shaft, main gear, or other internal parts are also damaged, confirm all required replacement parts before ordering.
For motor layout and repair reference, see the Tongsheng TSDZ2 Motor Repair Guide.
Comparison Table
| Model | Compatible Motor | Material | Weight | Benefits | Noise | Durability |
|---|---|---|---|---|---|---|
| Blue Nylon Gear | TSDZ2 (older) | High-strength nylon | ~55g | Lightweight, quiet, motor protection | ★☆☆ Quiet | ★★☆ Medium |
| Brass Metal Gear | TSDZ2 (older) | Brass + steel | ~155g | Strong, long-lasting, ideal for heavy loads | ★★★ Loud | ★★★ High |
| White Nylon Kit (with shaft) | TSDZ2B (new) | Nylon + steel shaft | varies | Required for new design, upgraded structure | ★☆☆ Quiet | ★★☆ Medium |
Installation Tips
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Remove motor cover and old gear
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Clean gear housing and apply high-temp grease
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Install new gear, ensure smooth meshing
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Expect increased mechanical noise if using metal gear
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Check bearing lubrication before closing the motor
Harper –