SwissTop organic brake pads set Disc 34 RS, compatible with Shimano Dura Ace BR-R9170, Ultegra BR-R8070, 105 BR-R7070; Tektro HD-R310; REVER MCX1 Flat Mount. Disc RS offers a balanced combination of braking performance, durability and incredibly low noise level in all circumstances The steel back plate with a thickness of only 1.6mm offers ideal thermal characteristics thanks to the hardness and stability of the steel Very high durability Predictable and progressive braking power Heat tolerance: 7/10 Durability: 8/10