Replacing your brake pads will increase braking power and ease of stopping. We recommend replacing your brake pads every 1-2 years, or every 5,000 miles. Pad wear will depend on terrain and conditions. Shimano replacement road brake pads for the following Shimano brakes: BR-9000,7800,7700,6600,6500,R600,5600,5500, and 5501. Set of two brake cartridges. Easy install.