XJI6191
NAXJA Forum User
Right.
One is not hub-centric and is merely sandwiched between the wheel and the hub mounting surface, which allows for movement and the eventual loosening of the lugnuts. Definity sketchy and should be outlawed.
The other is hub-centric and bolts directly to the factory studs, torqued to factory wheel specs. Then the wheel is bolted to the studs of the spacer and torqued to factory wheel specs. Safe solution that poses little risk when installed properly and all nuts are torqued to spec.
"hub-centric" was the term that evaded me when composing my earlier post but that, to me, means ones with a centre bore which is a snug fit on the raised hub centre. Of course the 3mm & 5mm ones we are still allowed to use are really no more than shims, for where there are minor clearance issues.
The issue with spacers, right from the get go, was not that they were dangerous in the way you describe but simply that they will trash bearing in no time at all. Perhaps, with hindsight, that was scaremongering, as I've never come across a mention of it in connection with Jeeps.