When will I receive my order?
Parts & Accessories orders that are placed before 1 pm are estimated to be delivered the next working day. More delivery info here.
For example, if you place an order before 1 pm on Wednesday, we'll aim to get this out that same day for estimated delivery on Thursday.
If, for example, you place your order after 1 pm on a Friday, or at the weekend, we'll aim to dispatch on Monday for estimated delivery on Tuesday.
Do you deliver outside of the UK?
We deliver to over 150 countries worldwide. Please add any items you require to the basket; the shipping to your destination is calculated at the checkout.
You can learn more about delivery information here. We have a separate page with estimated international delivery times.
Due to restrictions, there are some items we can't deliver internationally (battery packs and aerosols). These items are clearly stated on each product page.
Why can't I purchase some items?
Some certain products we hold exclusively to support our bike customers (those who purchase their bike directly from us).
When you purchase your bike directly from us, your account is unlocked for quick access to order these spares, should you need them.
Purchased from us, but don't see the option to 'Add to Cart'? Please get in touch and our team will be able to assist.
Description
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 on the drive unit assembly.
PLEASE NOTE: If you have a Bosch Classic +, Active Plus or Performance system (Featuring a small sprocket on the front), you will require a different lockring.
We also sell the Bosch Spider Tool to safely remove and replace this nut. Available from our store.
Just to confirm it's to fit the following motor shape. If you require a Classic+ lock ring, you can find it on the dedicated Bosch Classic Lock Ring page.
Next business day UK mainland delivery on parts & accessories
NEXT DAY DELIVERY
Parts & accessories ordered with a bike will arrive fitted where possible
WE FIT PARTS
Parts & accessories dispatched same day if ordered before 1pm
SAME DAY DISPATCH
We deliver electric bike accessories to over 150 countries worldwide
WORLDWIDE DELIVERY