suitable for cyclists seeking enhanced performance, these cassette spacers help maintain proper spacing between gears, ensuring smoother transitions during rides. Whether you're tackling steep climbs or cruising on flat terrain, these spacers contribute to a efficient and enjoyable cycling experience by reducing mechanical friction and noise. Features -Color:Black -Material:Aluminium alloy -Size:3.50X3.50X1.00cm/1.38X1.38X0.39in -Thickness: 1mm, 1.5mm ,2mm ,1.85mm ,2.18mm ,2.35mm -Optimized gear alignment cassette spacers: makes sure accurate positioning of the cassette, enhancing gear functionality and reducing wear during rides -User friendly design cassette spacers: features a simple yet effective spacer system for easy installation and adjustment of gear spacing -Broad compatibility cassette spacers: suitable for multiple bike types, including mountain and road bikes, ensuring a universal fit for most cyclists -Robust construction: built with aluminum alloy for exceptional durability and reduced maintenance frequency -Improved cycling comfort: designed to elevate your riding experience, whether navigating city streets or exploring challenging terrains Package list: 6 x Bicycle flywheel washer