About this item Bicycle Flywheel Hub Spacer Size: You will get 8 pieces speed cassette bicycle washers, consisting of 1 pieces 1 mm, 1 pieces 1.5 mm, 1 pieces 1.85 mm, 2 pieces 2 mm, 1 pieces 2.18 mm, 1 pieces 2.35 mm, 1 pieces 2.5 mm washers. 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. Material: Made of high quality aluminum alloy. Compact and durable, with a long service life, no need to replace frequently. Light weight, easy to install and remove, and you will have a better cycling experience. Good Performance: Perfect for adjusting the bottom bracket, steering wheel or bicycle hub, these bicycle headset washers will never accumulate dust or rot by oxidation. Grooves precision machined to exact tolerance for decrease vibration in rotation. For most bicycle, our bike spacers are suitable. Range of Application: Bike headset spacers suitable for mountain bike, road bike, widely applied. 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. Easy to Use: Suitable for mountain bike, road bike to adjusting bike bottom bracket, flywheel or hub. It’s easy to install with its special design. These spacers are good accessories for Bottom bracket or hub adjusting, saving time is your best choice.