![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=1080&crop=smart&auto=webp&s=01151e80db65df736d5d90d6d1971b16f3e1a45c)
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
![Rotor Alignment Tool Disc Brake Shimano Sram Adjustment Brake Pad Spacer MTB Rubbing Dura Ace Ultegra 105 XT eTap Red Rotor Alignment Tool Disc Brake Shimano Sram Adjustment Brake Pad Spacer MTB Rubbing Dura Ace Ultegra 105 XT eTap Red](http://tipartstitanium.com/cdn/shop/files/76e97645554a052906c70115fdc538d5.jpg?v=1706089397)
Rotor Alignment Tool Disc Brake Shimano Sram Adjustment Brake Pad Spacer MTB Rubbing Dura Ace Ultegra 105 XT eTap Red
![Amazon.com : Shimano TL-BH62 Disc Brake Hose Cutting and Insert Tool : Bike Components : Sports & Outdoors Amazon.com : Shimano TL-BH62 Disc Brake Hose Cutting and Insert Tool : Bike Components : Sports & Outdoors](https://m.media-amazon.com/images/I/61RPJJTXUoL._AC_UF1000,1000_QL80_.jpg)