Changed out of stock Kumho tires at around 17,000km about two years ago. Having clocked 30,000km on highways and city roads, the F1A5 still retains much of its well-reviewed dry and wet grips and handling characteristics. Even now, it performs well for dry and especially wet braking. At the same time, being UHP tires, the noise and comfort characteristics are not exceptional, but I find them still acceptable. Rolling resistance was high for the first 20,000km; thereafter, the drop in resistance was noticeable, with the car able to roll and coast for longer distances. All in all, very satisfied with the overall performance of the tires, especially when they cost about 20% to 25% less than the PS4.