Unior Bosch 2nd Generation Lockring Tool

Tackle Bosch® Gen 2 e-bike maintenance with confidence using this precision-engineered chainring lockring tool. Built from premium carbon steel with a 1/2" drive fitting, it’s the perfect fit for professional or home mechanics working on Active Line, Performance Line, and CX models.

• Designed for the installation and removal of chainring lockrings on Bosch® Gen 2 e-bike motors.
• Precision-engineered with CNC machined premium flex plus carbon steel for superior durability and performance.
• Integrated 1/2" drive fitting ensures compatibility with our ratchet, fixed handle, and torque wrenches for convenient use.
• Compatible with Bosch Active Line, Performance Line, and Performance Line CX from model year 2014 onwards, with a 50 mm lockring outer diameter.
• This tool serves as a reliable replacement for the Bosch® 0275009003 tool.

All UK Mainland Bike Deliveries Over £999 - Free Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).Bike orders under £999 and eBikes will incur a £25 delivery fee.

Free Delivery On Orders Over £199.99 - When you spend more than £199.99 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.

Click & Collect Orders -Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.

At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged.

Find Out More About Returns >