Metal or resin—that's the fundamental choice when replacing disc brake pads. Resin pads run quieter and offer more gradual initial bite, which some riders prefer for everyday use. But the Shimano L04C Metal pads prioritize raw stopping power and longevity, making them the go-to option if you ride in wet conditions, descend aggressively, or just want pads that last longer between replacements. The sintered metal compound handles heat and moisture without the performance drop-off you get from organic materials when conditions deteriorate.

These pads use Shimano's Ice Tech design, which adds aluminum cooling fins to the backing plate. The fins increase surface area for heat dissipation, pulling thermal energy away from the pad compound and rotor interface. On long descents where you're dragging brakes through switchbacks, that heat management translates to more consistent lever feel. Brake fade happens when pads get hot enough that the compound can't grip effectively—the fins buy you additional margin before you reach that point.

The backing plate itself is a composite of aluminum and stainless steel. Aluminum conducts heat into the fins efficiently, while the stainless layer provides the structural rigidity needed to resist the shearing forces during hard braking. It's a purposeful combination that serves the cooling function without compromising the mechanical integrity of the pad under load.... Read More