Hello Nam...
Well tonight I have recieved my hub centric rings from d.c.tires..

I mentioned my car being 56.1 and my wheels being 73.1 (TDR Pro1s)

and they have sent me 73x56.15...
Its my first time using centric rings and I have no clue which side goes where, actually I don't even know did I get the right ones..

73 x 56.15 it stamped on the rings...!

Help the noob..!

 

Never mind..!!
My wheels had hub centric rings on it already..(used) which was black plastic pieces.. so I had no clue about them being on the wheel.. I took them off and fitted my new rings..! It fits perfectly..!

Excuse me..