I currently have a set of victoracers off my stock Z wheels. There is a ton of life left in these tires. I have used them for probably a total of 7-8 events. Still very sticky and I did pretty well in SM2 on these. I did have them on 16 x 8.5 rear TT wheels on all four corners, and i don't know how well they will fit a regular set of Z front wheels (7.5). For that reason I am willing to split them into pairs for those interested. There was absolutely no rub on the fronts when i was using them up front.