Tongsheng OSF Electric Bike Conversion Kit for MTB, Tricycle, and Road Bicycle

The TONGSHENG TSDZ2B Dual Clutch Torque Sensor MID Drive Motor & Bottom Bracket 68/73mm is a product from the DIY Bike to Electric brand. Cooperating with Tongsheng for over 10 years, we strive to power your cycling life.

The TSDZ2B Mid Motor for MTB, TSDZ2B Mid Motor for City BIKE, and TSDZ2B Mid Motor for Tricycle are available in various configurations. The 48V500W OSF Mid Drive Kit, 48V 750W Mid Drive Kit, 52V750W OSF Mid Drive Kit, 48V 500W Mid Drive Kit, and 52V 750W Mid Drive Kit are some of the options to choose from. Additionally, a Battery Parallel Module is offered.

Regarding customer reviews, the products have received mixed ratings, ranging from 3.0 to 5.0 out of 5 stars. The prices for the different kits vary from $349.00 to $459.00.

The TSDZ2B model features a maximum torque of 80N.m, a maximum speed of 40KMH, and a bottom bracket of 68-73mm. It weighs approximately 3.6kg. The TSDZ8 model, on the other hand, has a higher maximum torque of 140N.m and a maximum speed of 45KMH, but weighs around 5.8kg.

The mid drive motor is designed to fit bikes with a 68mm (2.68inch) or 73mm (2.87inch) wide bottom bracket. The inner diameter of the bracket should be at least 33.5mm. Additional washers and bolts are provided for 73mm bottom brackets. However, this motor cannot be installed on carbon fiber frames.

The OSF 860C LCD display, which is included with the throttle and no brake, supports rated voltages of 24/36/48/52V and offers 0-9 support modes. It has dimensions of 96.671.66.1mm (3.82.80.1 inch) and a USB charge port of 5V 500mA.

Proper installation of the speed sensor with the magnet is crucial. The distance between the sensor and magnet should be 10mm to 15mm, and the arrow on the speed sensor must align with the magnet. Dual socket speed sensors are necessary, with one socket connected to the light cable and the other to the mid motor speed sensor connector.

During the motor installation process, it is important to follow the correct steps. The exposed shaft length on the left should be no less than 10mm, and washers may need to be added to avoid the motor flange touching the bike frame, which can interfere with the torque sensor.

The updated TSDZ2B model features two clutches designed on the main gear, disengaging it from the chain during riding, resulting in a more effortless bicycle-like experience. This also improves the motor's centering, spacing accuracy, and waterproof performance, extending its lifespan.

The TSDZ2B is a standard universal mid-drive motor that fits most bikes with 68-73mm bottom brackets, specifically designed for disc brake and chain drive systems. It offers open-source firmware, allowing cyclists or developers to customize parameters and integrate additional features to better suit their needs.

The smart torque sensor accurately detects the force applied on the pedals, converting it into kinetic energy with excellent starting performance. Users can also utilize the throttle function when they feel tired.

The mid-drive system's weight, around 3.6kg, accounts for 19-26% of the typical 10-15kg bike weight, and its central positioning helps distribute the weight more evenly, preserving the original bike structure and compatibility with various bike types.

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