I recently got into mountain biking and bought a Salsa Ridgeline. It came with good resin brakes. Well, after hitting the famous Ridgeline trail in DuPont forest, they started to squeal. As a newbie, I burnt the pads. So, knowing brakes, I opted for semi-metallic. Wow, what a difference. These things can stop you on a dime. Excellent, and troublesome, for a new rider. Hit Ridgeline again yesterday with zero squeal, no fade, and no issues at all.See full review