Campagnolo 11S Cassette Lockring
Campagnolo replacement 11 speed cassette lockring.
Select the correct lockring for 11 speed Campagnolo cassette with either an 11T starting cog or a 12T starting cog.
11T Campagnolo cassette lockring: Campagnolo part x
12T Campagnolo cassette lockring: Campagnolo part xx