Types of OEM wheels

Cars and tires manufacturers join forces to create a product suitable for their car models in order to meet their unique specifications. These characteristics are so unique that it becomes very difficult to distinguish them from "regular" tires.

For example, tires featuring the star, designed for BMW, are made with a reinforce tread structure to resist and correct the negative camber angle specific to BMW. At Mercedes, since the free space be-tween the wheel and the car body is often smaller than for other manufacturers, tires with a Mercedes mention are generally narrower.

Small reminder: the first digit of a tire size is not only the width of the tread, but the width of the section, sidewall to sidewall, of the tire when inflated.

All this is fine, but what happens when we have in our yard a BMW with approved OEM tires and that we must replace two of the tires and no tire with a star is available? The answer, you guessed it, is that we should not mix two homologations.

It's like making the mistake of installing Nokian tires on the front axle and Pirelli on the rear axle, just because they are different tire manufacturer. Unfortunately, we must therefore proceed to changing of all four tires.

However, if you own an Audi (or any other brand) in your garage and there are no approved OEM tires available for that brand, but there are some "regular" and Mercedes tires in your size, which one should you choose?

Unquestionably the "regular" ones! The reason is simple; OEM tires are too specific for particular brand and may not fit perfectly for other vehicle brand, this is why it is wise to choose the "regular" tires because they are considered more versatile. & Kevin Brisebois

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