lexus is200, centre boss, hub, inner bore problem

[danc4070]

Hi, I recently bought a Lexus is200, it is on a w plate, covered 45k miles, I got a puncture the other day went to put the spare wheel on( the spare is a genuine Lexus 17" wheel, but the inner bore of the wheel is about 10mm in diameter smaller than the centre boss on the brake disk, this is the same front and rear, the disk diameter is correct front and rear( 296 front-308 rear), the brakes look as if they are the original item although may not be, did anyone have any ideas as to what may be incorrect. The wheels I bought the car on are not standard, any help in this would be great

[gareth_r]

The actual hub spigot is 60.1mm and there is a spigot ring that acts as a spacer between the spigot and the larger centre bore of the universal aftermarket wheel.

The spigot ring is stuck on the hub.