SwissStop Exotherm2 34 Disc Brake Pads Shape: Shimano K-Type/L-Type Dura Ace M9270 Ultegra 8170 Tiagra 4770 Organic PairSwissStop EXOTherm2 Disc Brake Pad Set Disc 34: Shimano Road "L" Shape. EXOTherm2 combines an extremely durable smooth modulating pad compound with a cooling fin equipped back plate which provides consistent powerful braking in all conditions. The EXOTherm2 technology is SwissStops maximum pad life compound that also offers minimum brake fade Organic compound provides a low pad wear rate Aluminum backing plate is equipped with cooling fins for heat