The car`s wheels are mounted on the hub, so the hub bore has to be just big enough to snugly fit it. Most wheels have a standard hub bore size of 60mm-73mm. However, some aftermarket wheels for the BMW Z4M may have a larger bore size. That is why drivers should be very attentive when selecting new wheels. If you`re unsure about the bore size, just consult the BMW Z4M manufacturer`s manual or hub bore size charts on our webpage. Simply find the necessary model and you will see the desired details. With our help, the purchase process would be much easier!