Shimano road disc brake pads alloy backedthe shimano l04c alloy backed pads are suitable replacements for br rs805 and br rs505 disc brake calipers they feature a sintered pad for excellent braking in both wet and dry conditions these pads feature an alloy backing plate to conduct heat away from the pad and cooling fins to dissipate that heat features works with br rs805 and br rs505 calipers radiator fins for cooling alloy backing plate for excellent heat conductivity sintered compound ge