Experience next-level braking performance and maximize the braking power of your Shimano Dura Ace / Ultegra / 105 / GRX / Tiagra / XTR M9100 calipers with Kogel replacement disc brake pads. Available in two sintered compounds that offer the best braking potential for your riding style. Both pad compounds help you do one thing; go faster with less energy. Choose Kratos compound for best durability in wet environments and intense braking. These pads reach maximum potential with some heat buildup from cornering and descending. Choose Bia compound for rides where braking isn't a constant. Imagine going uphill for 30 minutes, then railing the hairpins on the way down. This softer compound has great bite, hot or cold, and is best kept in dry conditions. All Kogel disc brake pads feature: - Ceramic Barrier coating on the backside of pads to keep heat in the compound and out of the system, improving sustained performance and negating any need for fins - Two customized sintered compounds give you better sustained and on-demand braking performance in any conditions so you can go faster! - 100% recyclable materials putting less strain on our environment so you're doing more to make riding fun for generations to come (vs organic pads that go to the landfill) - Nickel and lead-free (both are toxic) construction making them less toxic and better for our environment so you and creatures along the trails will live longer