Anti-oil shield: an oil resistant layer that protects internal components from oils encountered during maintenance or riding. Full adaptability: a curvilinear structure that fits different brake disc diameters, ideal for urban and amateur cyclists. An intuitive mounting system simplifies maintenance and guarantees cross-model compatibility. Protective shield: the specially shaped structure prevents humidity buildup and erosion from cleaning products, ensuring perfect alignment and continuous protection of internal mechanical parts. Compact and reusable: made from flexible, impact resistant material that adapts to any brake disc size. Folds quickly to pocket size for storage in small spaces. The aerodynamic design minimizes dirt accumulation and allows quick cleaning between uses. Use scenarios: - Urban daily riders who switch bikes or discs can mount quickly thanks to cross-model compatibility and adaptable sizing. - Home maintenance and cleaning sessions benefit from the anti-oil shield and protective shield, reducing corrosion and keeping components aligned. - Travel, errands or small-space storage: the compact foldable form fits in a bag or pocket and enables fast cleaning between rides.