The T1-R is the replacement for the T1-S. There are some minor changes between the two...such as the tread design, which reduced the tire noise that the T1-S' occasionally had.

 

I have direzza now sp9000 before this set ...sp9000 grip better direzzas' will last a little longer (i hope)
been a dunlop guy since my last blow out a few years ago (blew out a tire, rear driver side from a nail it was during a heavy rain storm was not aware that the tire was flat drove from hacienda to cerritos on this flat destory the sidewalls but no damage to the wheels )

 

+1 Toyos for the price is one of the best tire you can buy period.