Lago Blue

First, let me say this is not everything you need to know about wheel fitment, just a couple of observations.

This is about checking that the centre-bore of the wheel for Audi-specific fitment; and that it is machined to use the VAG spherical wheel bolts/nuts vs. conical.

The above wheels may well fit, as back when they where offered, they certainly made Audi versions amongst others, I had a set on my B3. They are called Moda Sports, made in Italy under license IIRC.

Why the centre-bore is important is because the wheel must be held centred against the hub, and the lovely factory (Porsche uses the same shape) spherical (ball-seat) lug-bolts are not up to that task. The wheels need to be "hub-centric" and the centre-bore needs to be Audi spec to accomplish this.

Not mentioned in the posts above, or at 20v.org, is the fact that there are other cars out there that have a 4 x 108mm PCD, but do not share the Audi 57.1 (?) (IIRC) centre-bore. The chamfer on the centre-bore must accoodate the radius on the Audi hub or the wheel will not sit onto it's face.

An example would be the Ford Focus (4 x 108mm PCD) which has a required centre-bore of 63.3mm, and even though the off-sett may be fine, the centre-bore may not be.

Some wheels are factory machined to fit the Audi hub, as these where IIRC, others require a factory insert, often plastic, to be hub-centric.

Perhaps the best way to illustrate this feature, is to show the H&R spacer that mimics the factory hub-centric fit (shown: Audi H&R Wheel Spacers DR 15mm 4x100, 4x108). You can see that the spigot that protrudes from the otherwisw flat disc that is the "space" of the spacer, this is the required hub-centric shape you want to find in your wheel.

The wheel bolt photo should be self-explanatory.