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?