I couldn't fit type s rims only on rear passenger side because of "wtf is this"

[int5]

guys and girls,
I need help :)

type s rims. 17x7 5x114.3 +45 offset
they will fit my dc5 base model without any problems but only on the rear passenger rotor i came across this [see pic 1], obviously it is too large to fit the wheel.

what is this purple thingie? and rotor cap? I think it can be removed but no so sure. Can someone please confirm and point me in the right direction Thanks in advance

pic 1
http://i47.tinypic.com/swsgg0.jpg


rear driver rotor looks like this, with cap? [pic2] and it fits perfectly (without the purple thingie)

pic2
http://i46.tinypic.com/21a0ppt.jpg

front passenger and driver rotors have no cap (?) at all [pic3, 4]
is that normal?

pic3
http://i50.tinypic.com/2czzmt.jpg

pic 4
http://i50.tinypic.com/2zf7uic.jpg

[fuzionz]

Thats a hub ring, it centres whatever rims you had before to the hub of the vehicle. Just pry it off and fit the type s rims.

[ceekay101]

Tap it with a rubber mallet all round and it should come off with ease.