In the context of car rims, the "mounting depth" refers to the distance between the hub mounting surface of the rim and the rim's outer edge. The rim's offset is expressed in millimeters and is usually stamped on the rim along with the letters "ET," which stands for "Einpresstiefe" in German, meaning "insertion depth" in English. A positive offset means that the hub mounting surface is towards the outside of the rim, and a negative offset means that it is towards the inside.

When the rim mounting depth is specified in the range from ET30 to ET45, it means that the rim can be mounted on a car hub with an offset within that range. A rim with a higher ET value has a shallower mounting depth, meaning that the hub mounting surface is closer to the outer edge of the rim, while a lower ET value means that the hub mounting surface is closer to the inside of the rim.

Regarding your second question, if the rims have a marking of ET50, it means that the hub mounting surface of the rim is farther towards the inside compared to a rim with an ET value of 30 to 45. Therefore, the rim with ET50 cannot be mounted within the range of ET30 to ET45. It is important to note that installing a rim with an offset outside the recommended range can cause handling problems, damage to the suspension or steering system, and tire wear issues. It is best to consult with a professional mechanic or a wheel expert to determine the appropriate rim offset for your vehicle.

Co oznacza, że głębokość mocowania obręczy określono w zakresie od ET 30 do ET 45"?