Push through bullet centres come in three different sizes.
The most common use is for the wheels listed below which will take the 3 1/8" cap.
14", 15"& 16" Smoothie Wheels
w/4.5,4.75 Bolt Pattern
14"& 15"Gennie Wheels/Soild Wheels
w/4.5,4.75 Bolt Pattern
14" & 15"OE Wheels
w/4.5,4.75 Bolt Pattern