Installed Pirelli Angel GT 500 miles ago. So far I am very happy about its performance. This is my second set and my only experience with ZX14R is the OEM BS S20. I ride both F&R at 42psi. Angel is very sticky for ST tire. I have done several trips to Alice (Hwy 35) and felt confident on both dry and wet roads. Handling is neutral and leaning is easy. At 42psi, the ride is bit harder than S20 but doesn't bother me much. Angel seems to be better in handling those nasty rain grooves on freeways. I bought a set from Rocky Mountain ATV and they were great. Price was really good at $384 for a set and shipping was very quick. I am hoping that Angel lasts at least 10K miles as S20 lasted for 6700 miles. After 500 miles, the GT logo is fading but otherwise the tread looks good.