♬Make from Aluminium, strong, light weight and enduring. Can used long terms. ♬Good texture, smooth surfaces, practical. ♬Specially designed for mountain bikes to ensuring smooth gear shifting and enhances the riding . ♬: The design is simple, and users can quickly complete the installation without the need for complex tools, making it convenient and fast. ♬On the premise of ensuring strength, maintain light weight, reduce overall vehicle weight.