hey everyone, i have the AR136 wheels on my truck and are in bad need of center caps. i measured the hole and it measures to be 3 3/4 inches, but i have no idea what ones i will need. i was looking at my rims and noticed that three hub holes are the same for the center caps to snap into but one is different, can u tell me y? is this how they came as a set and the caps will fit? please help. i hope someone can seriously help me.