About this item Bicycle Flywheel Washer: 8 pieces of 7 sizes: 1.0/1.5/1.85/2.0/2.0/2.18/2.35/2.5 mm thickness. The appropriate thickness can be selected according to the actual use requirements, replace the old or bad gasket, increase the service life of your bicycle Ultra-light Bike Spacer: The bike flywheel hub spacer is made of high quality Aluminium Alloy material for lightweight and high hardness. Grooves pricisely machined to exact tolerance for reduciing vibration in rotation and protect other parts Easy to Use: These bike washers are easy to install and remove, no complicated operations are required. You can install or remove the flywheel hub spacer in no time without help, saving you time Bike Cassette Spacer: Perfect for adjusting your bike bottom bracket, flywheel or hub. These Bicycle gaskets can be used on mountain bikes and road bikes for a wide range of applications. Our bike spacers are suitable for most bikes Widely Uses: 7 different sizes of bicycle hub gaskets to suit a variety of application. These aluminium alloy flywheel hub washers fit 10 speed cassette to 11 hub; Fit 7, 8, 9 speed cassette to 10 11 speed hub; Fit 7 speed cassette to 8, 9 speed hub