They did not mill the spacer correctly for a 2nd generation 4Runner front axle.
The inset lip hits the wheel hub before seating to the lugs.
Pros
STURDY DESIGN - Hub-centric wheel spacers designed with a thicken centering collar ensuring exact wheel fitment and eliminating vibration, 12.9-level bolts with dacromet coating treatment also enhance the strength of the flange from details.