![New to centerlock disc brakes. The tool does not fit over the rear hub axle nut. What am I doing wrong? Do I need the externally serrated lock ring? The rotor is New to centerlock disc brakes. The tool does not fit over the rear hub axle nut. What am I doing wrong? Do I need the externally serrated lock ring? The rotor is](https://preview.redd.it/new-to-centerlock-disc-brakes-the-tool-does-not-fit-over-v0-h2kn2jex14ia1.jpg?width=640&crop=smart&auto=webp&s=32cb61f0b1581307f625ce52f1354c4651f8c00d)
New to centerlock disc brakes. The tool does not fit over the rear hub axle nut. What am I doing wrong? Do I need the externally serrated lock ring? The rotor is
![Amazon.com: Centerlock Lockring, Rust Resistant Universal Anti Deformation Centerlock Lock Cover Ring Disc Rotor Lockring Bike Accessory Centerlock Rotors Tool for Bike Mountain : Sports & Outdoors Amazon.com: Centerlock Lockring, Rust Resistant Universal Anti Deformation Centerlock Lock Cover Ring Disc Rotor Lockring Bike Accessory Centerlock Rotors Tool for Bike Mountain : Sports & Outdoors](https://m.media-amazon.com/images/I/51BkAhZrZdL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Centerlock Lockring, Rust Resistant Universal Anti Deformation Centerlock Lock Cover Ring Disc Rotor Lockring Bike Accessory Centerlock Rotors Tool for Bike Mountain : Sports & Outdoors
![180mm Disc Rotor Centerlock | Centerlock Brake Disc 160 | Center Lock Brake Rotor - Disc - Aliexpress 180mm Disc Rotor Centerlock | Centerlock Brake Disc 160 | Center Lock Brake Rotor - Disc - Aliexpress](https://ae01.alicdn.com/kf/S23346f79ccb549e1ada3071e36d368900/Nutt-Disc-Brakes-For-Bicycle-Centerlock-Rotor-140-160-180Mm-Mtb-Mountain-Bike-Hydraulic-Mechanical-Brake.jpg)