Wow! Maybe a sticking caliper. My brother had problems with crud in the front calipers that were not fully releasing and after several flushes they seem to improve. I typically get 20 track days (2000 track miles) on the ST-43s in front, 40 or more days on the rear. I have used RS-14s and RS-29s but get a lot more life out of the 43s with better modulation.
We do have a couple of hills out here as well.
