Finally SR4 rubber was replaced. The Hankook V12 served us well for 4 years. I tried to look for it for a month but it is out of stock up to importer level. Yesterday after noticing the wear on the tyre have signed of the threads coming out, I know the replacement must be made. After some consideration and getting some inputs, 4 pieces of PS3 is the one (thanks Koh). Immediately after installing the shell, I go to "The Tall Guy's" for alignment check and dynamic wheel balancing. The 2 front wheels is ok but the 2 back wheels need to rebalanced. After a little bit of driving, I found it quite good in the dry, very grippy. So lets see how it goes when it rains. (Pictures will be added later).