Bumpy ride. Is it the casing or the inner tube? I pumped a new tube to about 80 psi (I missed that on the casing the recommended pressure is 100 psi). On the ride immediatly, I hit a very small kerb harder than I wished and after I noticed that my ride was bumpier than usual (though I couldnt say for sure if it's because of the kerb). Upon visual inspection, I notice that the casing doesn't go perfectly round (between the lowest point and the highest there seems to be maybe a 3-4 mm difference). The inner rim seems round enough but the whole wheel (back wheel) seems a bit wobbly. 

I think it's not the rim that has issues. How can I check if I need to change the casing or the inner tube? 

Thank you.
OP said:  


  Well I still had a warranty on my wheels so I've changed them. They
  stopped being true I think. When rolled at high speed the wheel
  (without tubbing and tire) was very unstable.


Hooray for warranties!  Remember, always keep your receipts, and don't procrastinate or the warranty window may close on you.