Bosch Lockring BDU4XX BDU37YY BDU31YY BDU34YY BDU38YY - Bosch eBike System 2 / The smart system

Bosch Lockring BDU4XX BDU37YY BDU31YY BDU34YY BDU38YY - Bosch eBike System 2 / The smart system

$14.00
SKU: EB11.200.0JH
Quantity:
In stock
Pickup available at Stage 21 Bikes Usually ready in 24 hours

Bosch Lockring BDU4XX BDU37YY BDU31YY BDU34YY BDU38YY - Bosch eBike System 2 / The smart system

Stage 21 Bikes

Pickup available, usually ready in 24 hours

23582 Moulton Parkway
#111
Laguna Woods CA 92637
United States

+19497163363

Bosch Lockring For Ebike System 2


Replace worn or damaged lockrings on Bosch mid-drive motors with this new, OEM-style component. Specifically designed for Bosch System 2 and compatible with BDU4XX, BDU37YY, BDU31YY, BDU34YY, and BDU38YY configurations, it secures the drivetrain for reliable power transfer and consistent shifting.

Key Benefits


  • Precise fit that minimizes drivetrain wobble and preserves crank alignment.
  • Rugged build withstands daily riding, mud, and alignment checks during service.
  • Simple, drop-in replacement that lowers downtime and maintenance costs.

Who this is for


Ideal for DIY enthusiasts, bike shops, and anyone maintaining a Bosch System 2 eBike. If your motor is in the listed family, this lockring ensures secure engagement of the locking mechanism.

Installation tips


Clean threads, inspect for wear, and seat fully before reassembly. Keep a spare on hand for routine maintenance.


keyword search EB112000JH

FREE Shipping

Free shipping within USA on all orders over $99.

International Orders

For non-oversized packages (almost everything except entire bikes) we ship internationally via the US Postal Service (Priority and Express Mail).

For larger packages we ship via UPS. Time in transit will vary, but most orders will arrive within 5-7 business days after dispatch.

We are unable to provide any currency conversion information, as your bank or credit card will have its own methodology for the exchange rate. You can use websites such as XE.com to get a good calculation as to current exchange rates.

FREE Shipping

Free shipping within USA on all orders over $99.

International Orders

For non-oversized packages (almost everything except entire bikes) we ship internationally via the US Postal Service (Priority and Express Mail).

For larger packages we ship via UPS. Time in transit will vary, but most orders will arrive within 5-7 business days after dispatch.

We are unable to provide any currency conversion information, as your bank or credit card will have its own methodology for the exchange rate. You can use websites such as XE.com to get a good calculation as to current exchange rates.

Got Questions?

We can help. Reach us directly at Stage 21.

Toll Free: 855-949-7433
Local: 949-716-3363

info@stage21bikes.com

STORE HOURS

Mon through Fri 10AM - 5PM
Saturday 12PM - 4PM

Got Questions?

We can help. Reach us directly at Stage 21.

Toll Free: 855-949-7433
Local: 949-716-3363

info@stage21bikes.com

STORE HOURS

Mon through Fri 10AM - 5PM
Saturday 12PM - 4PM

Your Payment is Secure

We use a PCI level 1 compliant system for credit card processing which means that it adheres to the highest standards in the world on server compliance, payment processing, and information privacy.

Your Payment is Secure

We use a PCI level 1 compliant system for credit card processing which means that it adheres to the highest standards in the world on server compliance, payment processing, and information privacy.