there is no 4st, only Primacy 4.

btw, that Taiwan video on comparing T005 v Primacy 4, take note T005 and T005A are two different tayars. T005 is geared towards performance-comfort whereas T005A is more comfort oriented. so there is no surprise if T005 bested Primacy 4 in most of the tests. T005A is more comparable to Primacy 4.

yes, i understand that T005A is meant for asean market. however, in the said taiwan review video, the tire used is T005, not T005A.
in the video, Pause at 0:19

you can see the tread pattern resembles this: https://www.tirerack.com/tires/BigPic.jsp?t...ewall=Blackwall
not the same as T005A's pattern.

so no surprise if T005 is better than Primacy 4. however, i do feel T005A is neck-to-neck with Primacy 4.