One tidbit of info if any one is going to buy ne aftermarket wheels for their older mopar or any other make of car. On the older cars the wheels were centered on the wheel studs. This was ok when every part was new. But over time the tires would get rotated or replaced. The wheels were removed for brake service etc... The point is that the lug wholes in the rims were soft and wore quickly. This would lead to the rim no longer being centered on the hub. At higher speeds this induced vibrations. In the last several years the wheel manufacturers decided to center the wheel on the hub registers. They do this by offering different diameter hub centrics, normally a plastic spacer ring that mounts to the hub or wheel and fits the wheel snugly centered now to the machined center hub instead of the lug nuts. This greatly eliminates high speed wheel vibrations. Most wheel manufacturers round off the metric measurement to eliminate confusion. The rims now will have a slightly oversized lug hole. And since the wheel is automatically centered on the hubs. the wheel will always mount centered on the hub .
We use a combination of the decimal system and the metric systems daily.
