VITTORIA VA7R endcaps rear hub 135/12mm through axle MCPAVA7R12A7H

Vittoria 135/12mm hub end adapter cap VA7R MCPAVA7R12A7H,  from qr hub to 12mm hub, push-in type, new design

The Vittoria hub adapter is an accessory that allows you to change the axle type (usually the front axle) of your bike, allowing for compatibility with different forks or to use wheels with different axle types. For example, you can switch from a 9mm QR (Quick Release) axle to a 15mm or 12mm thru-axle, or vice versa.