This Factory OEM BMW rim comes equipped on a BMW E85 Z4 model. The BMW style number for this wheel is bmw style 224. This is an aluminum wheel with a diameter of 18" and a width of 8" front and 9" in rear. This BMW Z4 wheel has 5 lug holes and a bolt pattern of 120mm. The offset of this BMW rim is 42mm front and 30mm rear. The corresponding OEM part number for this rim is BMW part number(s): 36107836832 for front wheel and 36107836833 for rear.