what pads fit? are they generic sizing? what compound would you recomend? mine are starting to make alot of noise after a few miles into the trail. really annoying, and it also feels like there losing performance when there making the noise. but that could just be in my head I guess. Im not worried about how long the pads last. just what are the best pads to use for stopping power and hopefully also not make that loud squeeling/scraping type noise after they get hot.