Swivel Hubs

tombate911

Paid Member
talk to me about swivel Hubs...
Stripped mine down today for one reason or another but that's a story for a different time.
It's obvious the top swivel is a ball joint and should be able to rock in it's socket. However the bottom one. Should that have any rocking movement in it or should it just be purely rotational around it's axis? My lower one can be rocked from side to side by a few mm, I'm wondering if this is the cause of a very faint knocking I have on the front left corner. Thanks.