Amazon.com : 2 Pairs of Shimano R55C4 Brake Pads for Carbon Rim (Dura Ace, Ultegra, 105) Road Bike Brake Pads : Sports & Outdoors
Amazon.com : Carbon Rim Brake Pads, Cork and Carbon Compound, Compatible with Shimano All Road Series Including Dura Race/Utegra / 105 and SRAM, Pack of 2 Pairs : Sports & Outdoors
Shimano R55C4 Carbon Brake Pads | R&A Cycles
Shimano Brake Pad R55C4-1 for Carbon Rims 2-piece pack (1mm thinner) – Bike Stop