Many aftermarket Center Lock rotors ship without lockrings, leaving you to source your own. The SwissStop Center Lock Disc Lockring provides a precision-machined aluminum solution that secures rotors up to 160mm in diameter. The external serration design interfaces with standard bottom bracket tools like the Park BBT-9, Park BBT-69.2, Shimano TL-FC33, or similar 16-tooth cassette lockring tools with a 44-45mm outer diameter. This tooling compatibility means you likely already own what you need to install it.

At 2.15mm thick, the lockring accommodates rotors within that thickness specification, which covers the SwissStop Catalyst family and most other Center Lock rotors on the market. The threading and spline interface are machined to meet Center Lock standards, ensuring proper engagement with hub splines and correct torque application. SwissStop developed this lockring to pair with their Catalyst rotors, but it works equally well with Shimano, SRAM, and other Center Lock compatible rotors.

Road and gravel wheelsets with 12mm or 15mm thru-axle hubs typically use the Center Lock mounting system, and this lockring fits that standard configuration. If you're building up a new wheelset or replacing a damaged lockring, this gives you a straightforward option without hunting through OEM parts catalogs.