The cassette washer for bike flywheel is engineered to optimize riding efficiency by reducing friction and ensuring smooth gear transitions. Its robust material prevents locking and slipping, making it suitable for demanding terrains. Compatible with various bicycle flywheel cassette spacer setup. Features -Color:Silver -Material:Alloy -Size:4.00X4.00X0.20cm/1.57X1.57X0.08in -Precision engineering: the cassette gasket for bike flywheel is engineered for accurate fitment, ensuring seamless integration with your bike's flywheel system -Lightweight design: this bicycle cassette spacer for flywheel is lightweight yet durable, minimizing added weight while maintaining structural integrity -Versatile use: the flywheel hub washer spacer is suitable for mountain bikes, road bikes, and other bicycle types, flexibility for various cycling styles -Effortless maintenance: the cassette washer for bicycle is easy to clean and maintain, ensuring upkeep for longterm performance -Enhanced gear performance: the cassette headset gasket for bike improves gear shifting precision, providing a smoother and more responsive cycling experience Package list: 5 x bicycle cassette spacers