I have Shimano 105 10 speed hub (FH-5600), with a "virtually new" Ultegra 10 speed cassette. I used the lock ring that came on on the freehub and I've done that up reasonably tight.
Should that hold the bits of the cassette fully tight? I can wiggle the cogs a little, which shows that the lock ring has bottomed onto something before it clamps the cogs. I'm just wondering whether I've got a spacer missing, or something else awry.
Thanks in advance, Tony S