Since were on the subject of hubcentric rings, knowing that all cars need them, but do all cars have them? I'm curious because I just recently had the tires replaced on a 2001 Isuzu rodeo. But the ride on these tires are very poor. As if the wheel/tires were not balanced. But they were (judging by the different wheel weights that were put on the wheels). But the feel is still kinda jittery. It's even worst when driven uphill.

Is this a balancing problem, or a hubcentric ring concern? Tire size is still the same, the only difference is that it's a different brand tire (from Yokohama to Bridgestone).

Sorry to go off-topic here, but I'm really concerned about this. I haven't had the opportunity to take it back to the tire shop to get it rebalanced (if in fact that is the problem). But what if it isn't? What if I did get it rebalanced and the problem still persists?