Replaced the old Hakka 4 with this rubber. Strongly satisfied. I go to work in the middle of the week and go skiing out of town a couple of times. On the old Hakka, I was pretty much worn along the ruts, on the new Pirelli - no. Let's see how she is with the loss of spikes. A cursory inspection of the drive front wheels after a month of operation did not reveal any dropped spikes. Paid 4200 per wheel. I would be quite happy if they cost 3000.