I had to replace mine at 12k... and they were probably 2mm under!I have finally put enough miles on a bike to replace brake pads. At 52,000 miles only one pad out of 6 was at the wear limit, but I went ahead and replaced all 6. That was on my Voyager 1700. I went with the EBC HH pads. They say it takes up to 250 miles of in town riding to fully bed them in.