Kogel Bearings Shimano (K-type 2-piston) Pads BiaKratos compound for dirtier and prolonged braking situations, think massive descents and constant speed management Bia compound for rides where braking isnt a constant. Instant on performance means youre always ready to reign in your speed a little or a lot These disc brake pads feature a exclusive Ceramic Barrier technology designed to keep the heat where it belongs, on the pads, not the rest of the system Made with 100% non toxic recyclable material