Left rear knocking...

I've just noticed a knocking from left rear when going over bumpy bits. All wheel nuts are tight and I can't see anything obvious around suspension (although i'd not know what I'm looking for anyway).

Last time I had the wheels off, the rim would not spin freely, but I could turn by hand so the caliper was a little tight but not fully seized so I didn't do anything with it. Not sure if that may be related but there is no rubbing sound and the disc doesn't seem to be wearing so I'm guessing it's not an issue yet.

Anyone have any suggestions?

Fix the caliper, it wont be long before its fully siezed.

could be shocks. they somtime get abit knocky when worn.

had it on my supra and a another car i had before that. the brake rotors will normally be stiff aslong as you dont need to use excesive force to move the the rotors it should be ok. The pads stay in constant contact with the rotors thats why there wont spin freely

I'll get the shocks and brakes checked fully in the near future. I'm guessing it's the shocks myself but I'm thinking about an all round replacement in the near future anyway so may just live with it for a while.

could be top mounts as thats what mine knocking was

Get it in the air and get all your subframe bolts torqued up correctly. Some of mine were "hand tight" (slight exageration).