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Bosch Performance CX (Gen 4) Lock Ring Kit

e-bikeshop.co.uk

4.5 (123)

Bosch Performance CX (Gen 4) Lock Ring Kit

Name: e-bikeshop.co.uk Bosch Performance CX (Gen 4) Lock Ring Kit - Bosch Performance CX (Gen 4) Lock Ring Kit
Brand: e-bikeshop.co.uk
SKU: 42436058808558
Price: 16.09 USD
Availability: InStock
Rating: 4.6957 (22 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$16.09

Quantity

Color

Black

Quantity

This is the Lock Ring and O-ring kit to hold the front chainring and/or spider onto the motor drive pinion on the Bosch Gen 4 Drive Unit (BDU4XX)

Substantially tougher than the plastic nuts, although be careful not to cross thread the nut ...

Reviews

4.7

23 ratings

Amazing service

Everything was perfect! The item arrived right on time, and the price was very reasonable. It is a genuine, original part that fits the Bosch Performance CX (Gen4) motor perfectly—just like the factory one. Reliable seller, highly recommended! Thank you!

Andras · May 27, 2026

Gen 4 lock n o ring

Easy to use site and delivered on time , but had to order the lock ring aswell as the o ring , not overly expensive but the option of further o rings would have been a nice touch . So inevitably I will still shop around and not bookmark e bike shop as my main go too

michael · December 18, 2025