Amazon.com: Pwshymi Bike Brake Rotors, Disc Center Cover Bike Centerlock Lock Lockring Ring Cover Disc Brake Hub Rotor Lockring 9/12/15mm Black for Road Bike Mountain Bike Sram Centerlock Ring Nut(One set) :
Disc Lockring Centerlock Sram Qty 1 , black von SRAM
SHIMANO Center Lock Ring for Quick Release and 12 mm Thru Axle SM-RT8, 9,95 €
FORMULA Center Lock Ring for Formula Center Lock Brake Disc, 9,50 €
SRAM Center Lock Lockring buy online - bike-components
SRAM Rotor Centerline CenterLock 180mm Black Rounded | The BackCountry - The BackCountry
Universal Cycles -- Formula Centerlock Rotor Lockring [FD-G045-34]
Disc Rotor Parts and Lockrings | Worldwide Cyclery