Trying to understand all aspects of wheels and tires, wanting to get aftermarket wheel with larger tires. Have 2010 sport with the 17" alloy wheels, looking at 17" aftermarket. Got the back spacing figured out (I think), what I can't find is a thread on center bore. 2 wheels I'm looking at have different center bores, 78.3 and 83.06. Both say they will fit my Jeep. Seems this should matter??? Is this where you get hub centric rings, if bore is too big? Anyone know what my stock wheels are? Searched internet, can't find there or on wheel itself. Any help is appreciated, don't want to make a mistake here.