picture this, if you take off your front wheel. You can see in the center of the hub the little round cover that covers the wheel bearings. If you take that off to expose the wheel bearings, and axle that the bearings, and brake rotor slide onto. Well that axle sticks out JUST enough that when I bolted the wheel on the center cap (of the tire) popped off. So I took a hammer and tapped in on the dust cap that covers the wheel bearings, but it was not enough. So I grinded off a "weee" bit of the axle so that the dust cap could be tapped in a "weee" bit more so the tire could be mounted and the center cap on the sportmax wheel would not hit the dust cap on the car and pop off. Make sense??