K03s reina Dura-ace-ultegra-105 pads

The Shimano K03S resin disc brake pads are the successor to the popular Shimano K02S disc brake pads and were specially developed for the road bike. These K03S pads are 40% more durable than their predecessors, without compromising braking power, grip and noise. Organic Compound Explained Organic brake pads are made of soft materials.