Features: Thin Planumberebog: The 165mm short leg plan weighs only 620 kilograms, enhancing the bike's quickness and flexibility, ideal for city commuting and mountain biking lacking added fatigue. Multiple Gear Preferencesecond: Proposals 45T, 47T, and 53 T chainring preferences to suit various riding fashion and demands, improving efficiency for both fast road cycling and daily commutes. Powerful Aluminum Alloy: Produced from grade aluminum alloy, it increases strength by 50% and significantly enhances wear resistance, ensuring durability and stability for long excursions and competitive cycling. Quick Installation Structuremail: Features a upgraded handle connection that allows installation five periods lacking special tools, excellent for cycle enthusiasts seeking a easy upgrade. Better Control Executparticlemail: Unique handle geometrization improves pedaling efficiency and response speed, maintaining stability during rapid accelerate, ideal for speed concentrated road pedalists. Specifications: Aluminum alloy Size: 25.6 X 14.2cm 45 T/47 T/53 T Package Includes: 1 X 45T crank disc Crank 1 note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.