I have a Thule apex swing bike rack attached to a 2->1.25 adapter attached to a 1.25 U-Haul receiver. The Thule-to-adapter attachment is really tight, thanks to a clever screw-type locking mechanism in the Thule. But the adapter-to-receiver junction leaves enough space to make the bike rack wiggle a little as I drive, but not enough space to insert an anti-rattle wedge (like http://www.etrailer.com/Hitch-Access...oor/93347.html).
So, when I go out and about, I see the bike rack sway left and right a little. Should this worry me in any way? What's the sign that I should pay attention to that damage may be happening in the adapter?