BBB Cycling Shimano Disc Brake Pads I Cooling Fins For Optimal Heat Dissipation I Organic Compound Brake Pads I DiscStop Coolfin BBS-561CThe DiscStop Coolfin Disc Brake Pads for Shimano. Our DiscStop CoolFin features our special cooling fins that provide maximal cooling of the brake pads. These brake pads have a special organic compound which is optimized to dissipate heat. Altogether this results in optimal braking power and durability. The DiscStop coolfin is perfectly suited for any use from long braking periods on a decent to short maximum braking power bursts. The pads are replaceable and pre-sanded which makes them directly ready for use.