Compatibility exclusively, these shims easy installation and team customization without compromising component integrity Ideal for competitive cyclists, bike enthusiasts, and shifting setups for road bike Durability plastics construction features antislip textured surfaces and multiple thick / color elections, engineered to withstands cycling conditions while protecting original button covers Optimizes electronic shifting during long distances cycling, or high speeds sprints while minimizing finger fatigue Customizable button shims for electronic shifters enable personality button function reassignment, enhancing control during cycling with ergonomic finger