Campagnolo AC21-N3W Adapter + Lock Ring Kit for 11T

This part fits on the end of existing 11 speed Campagnolo freehub body to allow a rear wheel to fit an Campagnolo 12 speed cassette.

Also includes a new lock ring for 12 speed cassette.

Please note this adapter and lock ring don't come with new 12 speed Campagnolo cassettes.

This part is required when adapting an 11 speed Campagnolo rear wheel to a 12 speed Campagnolo cassette.