Lightweight expansion cores set for bicycles Made from strength carbon fibers for exceptional durability and stiffness Engineered to elevate riding performance by improving core rigidity and power transfer Designed to fit standard expansion core interfaces on common bicycle builds Suitable for cycling enthusiasts, road cyclists, and mountain biking aficionados Benefits include reduced weight, increased stiffness, and improved ride responsiveness Use scenarios Road cycling upgrade: enhances acceleration, sprint performance, and energy efficiency on paved roads Mountain biking improvement: delivers better control and durability on rough or rocky trails Maintenance or upgrade: replaces worn expansion cores to restore original feel and performance Material and performance highlights Material: carbon fiber for strength and lightness Function: expansion cores set to reinforce core structure and improve rigidity Performance impact: lighter weight, stronger stiffness, and more precise handling Compatibility and applicability Compatibility: designed for standard expansion core interfaces commonly used in bicycles Applicability: suitable for road bikes and mountain bikes alike, for riders seeking improved performance without added bulk