-- Those rivets are just cosmetic. The Auto Drags are 2 piece - put together in the center, under where the tire is mounted, in other words between the beads. The are sealed with what appears to be clear silicone. -- Just look in the hub center hole, and You'll see the 2 pieces. -- I was wrong, about "just cosmetic". -- See post # 19. --- They still can leak air, in the center, between the beads, and I have a wheel that does leak there.