Bosch BDU4XX/BDU37YY/BDU31YY lock ring

Genuine Bosch Lock Ring for BDU4XX, BDU37YY & BDU31YY E-Bike Motors

Secure the heart of your e-bike´s drivetrain with the official Bosch Lock Ring, an essential component designed for a wide range of Bosch drive units. This precision-engineered part is the critical link that fastens your chainring directly to the motor, ensuring every watt of power you and the motor produce is transferred efficiently to the wheel. Whether you are performing routine maintenance, replacing a worn chainring, or repairing your drive unit, using this genuine spare part guarantees a perfect fit, optimal performance, and the safety you expect from the Bosch brand. Don´t let a worn or inferior part compromise your ride; restore your e-bike´s integrity with this original equipment manufacturer (OEM) component.

Key Benefits:

* Optimal Power Transfer: Engineered to exact tolerances, this lock ring ensures a solid, flex-free connection between your chainring and the Bosch drive unit. This eliminates any play or slippage, guaranteeing that all power is delivered directly to your drivetrain for maximum efficiency and a responsive ride.
* Uncompromised Safety and Security: The primary function of this lock ring is to securely hold the chainring in place, even under the high torque loads of a Bosch e-bike motor. Using a genuine part prevents the chainring from loosening or detaching during a ride, a critical safety feature for any cyclist.
* Guaranteed Compatibility: Specifically designed for Bosch BDU4XX, BDU37YY, and BDU31YY motor generations, this lock ring ensures a flawless fit. This eliminates any guesswork and prevents potential damage to your motor or chainring that can occur from using non-standard parts. It is the definitive choice for Performance Line CX (Gen4), Cargo Line, Performance Line (Smart System), Active Line, and Active Line Plus motors.
* Enhanced Durability: Manufactured from high-strength materials and built to withstand the constant forces and environmental exposure of e-biking, this lock ring is made to last. It resists corrosion and wear, providing long-term reliability and giving you peace of mind on every journey.

Main Features:

This lock ring is a vital piece of your e-bike´s motor assembly. As a critical part of the motor´s Closures and fastening system, it features a precisely machined thread and specific tool interface for correct installation and torque application (requires a compatible lock ring tool, sold separately). Its design is the result of Bosch´s extensive research and development, ensuring it integrates seamlessly with the drive unit´s aesthetics and mechanics. This component is the original, authentic spare part for maintaining the factory-level performance and safety of your electric bike.



Brand:- Bosch.

Category:- Lock ring (BDU4XX, BDU37YY, BDU31YY).

Subcategory:- E-Bike components.

Specifications:
-Drive-unit spare parts