The aero disc look, without buying new wheels.

Most people arrive at this idea the same way. You see a car with a solid disc where the spokes should be, you find out the look has a name, and the first product you find is Rotiform's AeroDisc. Then you read the fitment line and discover it threads onto three specific Rotiform wheels.

So the real question is not which disc is better. It is whether you have to buy a set of wheels to get the look. This page answers that, including the case where the answer sends you to Rotiform rather than to us.

What Rotiform's AeroDisc actually is

It is a thread-on wheel fan, sold individually, that fits their LAS-R, BUC-M and RSE cast monoblock wheels in 19x8.5. It bolts to a threaded boss in the centre of the wheel with a single fastener. At the time of writing it sells for around $75 a disc in gloss black or gloss white.

That is a good product at a fair price and we are not going to pretend otherwise. Seventy-five dollars for a finished, engineered part that mounts to a purpose-built boss is cheap, and it is cheap because they designed the wheel and the disc together and they build both in volume.

If you already own those wheels, buy theirs

This is the honest answer and it costs us sales, so we will put it in its own heading. If your car is sitting on LAS-R, BUC-M or RSE wheels in 19x8.5, Rotiform's disc is engineered for the exact boss in the middle of your wheel, it costs a fraction of ours, and nothing we make will fit you better. Buy the Rotiform. Come back if you change wheels.

Almost nobody reading this owns those wheels. That is the whole point of the page.

What it costs to get the look, either way

We have deliberately not put a number in the "set of the wheels" row. Wheel prices move and we are not going to invent one to make our column look better. You already know what a set of wheels costs, and you know it is not nothing.

Per disc we are more expensive and we will stay more expensive. A disc made for a wheel we did not build, in five diameters, across three bolt patterns, cut to your car, cannot cost seventy-five dollars. What you are buying with the difference is not having to change your wheels.

What we fit, precisely

Discs are made for wheels from 18 to 22 inch, mounted through a multi-pattern spacer covering 5x112, 5x114.3 and 5x120. The disc itself measures about two inches larger than the wheel it covers, which is what lets it sit over a wheel it was not designed around.

Between those three patterns you get most of the German, Japanese, Korean and American aftermarket: Audi and Volkswagen, most modern BMW, Mercedes, Tesla, Honda, Toyota, Nissan, Ford, and a good deal of what Lamborghini and Lotus put on the road. The fitment index lists every car we have confirmed by hand.

Where we do not fit

Three cases, and we would rather you read them here than find out after paying.

• 2020-2024 BMW M3 and M4. The G80 and G82 changed bolt pattern. We have tested it. It does not fit, and it is a popular enough car that we put it on the site rather than let people discover it themselves.
• Anything outside 5x112, 5x114.3 and 5x120. Porsche's 5x130 is the one we are asked about most and the one we cannot do today. Adding a pattern means cutting a new spacer, so it is a real decision rather than a switch we flip.
• Wheels below 18 or above 22 inch. Outside that range there is no disc to sell you.

If your car is not covered, tell us anyway. The list of patterns we have not cut yet is ordered by how many people ask for them, and that is the only thing that moves a pattern up it.

The others worth knowing about

We are not the only people making a disc that goes over a wheel you already own. HaloDisc and EV Raceworks both sell covers that mount over OEM wheels, aimed mostly at range on electric cars rather than at the look. If your reason for wanting one of these is efficiency rather than appearance, look at them properly before you look at us, and readwhat we say about MPGfirst, because it is less than you are hoping in every case.

There is also a large market in universal plastic covers at around ninety dollars a set. That is a genuinely different product and we have written about where the money goesrather than dismiss them.

What one frame of this actually looks like

The short version

If you own the three Rotiform wheels their disc fits, buy their disc. If you own anything else, the choice is not between two discs. It is between changing your wheels and not changing them, and that is the only comparison on this page that matters.