Put on 23k miles (2 years) on the GS-D3's: great looking tread design, good wet & dry traction, tire rubber started to dry & harden up at 18k miles & made for increase in loss of traction, changed out tire at 23k with about 10% tread left - no traction left.

After 8k miles (1 year) on the PS2's: a little stiffer sidewall for better cornering feel & response, good wet & dry traction (F1 a little better in the wet & PS2 a little better in the dry), after 8k miles have only used about 25% tread & still feels like new tires. Yet to know about the rubber hardening - haven't had them long enough......

 

Should I take the fact that nobody's mentioned Dunlop as evidence against them?