Def

The main problem regardless of spacer use or not, is that you're loading the lugs in shear(i.e. wheel is trying to snap them off at the base), while they're also trying to clamp the wheel to the hub. Threaded fasteners are VERY weak when loaded with a complex stress like this compared to using something like a large bore(like a hub bore on the wheel/hub) to locate the wheel, then let the studs only worry about clamping the wheel to the hub.

You put a spacer on the wheel and you're just exacerbating the problem by increasing the moment arm the shear force is using to load the lugs in shear. Think of spacers as going from a 6" baby rachet(no spacer) to break a bolt loose to a 24" breaker bar and getting much more torque - same principle.


As for plastic rings, they're fine in street driven cars, but I wouldn't take them out to the track. That said, the aluminum ones out there aren't much more, so I'd just go with those if I thought I was ever going to drive my car hard.

SoSideways

Only problem with the aluminum hub rings is that, nobody sells aluminum ones for cars with 10mm spacers.

They're either made for running with no spacers or 15mm spacers, nothing in between.

And not everyone want to buy those hub rings for the 15mm spacers, then have a machine shop machine them down to fit cars with 10mm spacers.

1slowS13

even a lot of those expensive brands do not have hubcentric rings in the bore of the spacer. are you suppose to accomodate spacers with aftermarket studs in your stock hub?