High quality: Bike disc rotors are made of high-quality stainless steel and aluminum alloy, durable, safe, and suitable for long-distance cycling. Practical design: Polygonal airflow design with wide hole spacing ensures efficient heat dissipation, reduces sand and dust accumulation, and minimizes wear. Precision-threaded design enables secure and direct integration with bicycle brake systems. Fine machining ensures perfect fit with your bike’s hub and caliper. Easy to install: Excellent craftsmanship and smooth surface finish ensure simple, reliable installation on any disc brake–ready frame and fork. Wide compatibility: Optimized drilling pattern enhances heat dissipation, self-cleaning (desilting), and water drainage. Ultra-lightweight construction combined with strong thermal performance makes it ideal for road bikes, mountain bikes, BMX, and MTB. Stable performance: Flat rotor surface ensures consistent braking stability during rides. Stainless steel rotor features a standard 6-bolt mounting pattern for easy installation on disc brake frames and forks. Color: Silver Material: Stainless steel + aluminum alloy Package includes: 1 x disc brake rotor 1 x diagonal adapter 6 x mounting screws Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.