The TRP 4-Piston Semi-Metallic pad is designed to provide a balanced performance between two compounds, one blue and one copper. This type of brake pad is intended to offer moderate modulation and durable wear, with a quiet braking experience and a gradual increase in braking power.

These pads offer a subtle onset of power, which is desirable for those looking for a more controlled and predictable braking experience, rather than sudden and aggressive braking. This can be especially important in situations where you need to brake quickly but still maintain control of your bike, such as when riding on wet or slippery roads.