SES Road Tires are proven in CFD and the wind tunnel to reduce drag, and are constructed to deliver rolling efficiency, durability, and a confidence inspiring ride – regardless of the weather. Product Description: REAL-WORLD FAST TUBELESS ROAD TIRES Over 10 years of aero product development with a focus on real-world performance has led us to tire development. Tire shape and construction greatly influence aerodynamics, rolling efficiency, and your confidence. SES Road Tires are proven in CFD and the wind tunnel to reduce drag, and are constructed to deliver rolling efficiency, durability, and a confidence inspiring ride - regardless of the weather. Product Details: Smart ENVE System Aero Optimized Shape and Tread Design Natural and Synthetic Rubber Compound w/ Activated Silica for All-Weather Performance Tubeless Ready and Inner-Tube Compatible Hookless and Hooked-Bead Rim Type Compatible Inner-Rim Width Compatibility: Weight: 25c (255g), 27c (265g), 29c (275g), 31c (285g) Vectran™ Protection Barrier Attention: Natural Rubber Sidewall Will Darken Over Time