Description This bike hub adapter is crafted with precision to ensure seamless compatibility between your wheel hub and disc brake system. Made from durable aluminum alloy, it prevents rotor bolts from loosening during extended use. Its lightweight design reduces overall bike weight, making it ideal for long-distance rides. ideal for converting non-boost to boost setups or adjusting thru axle spacers, it enhances riding efficiency and stability. Features - Color: Assorted Color -Material:Aluminum alloy - Size: 5.00X5.00X0.30cm/1.97X1.97X0.12in - Size: 1.70X1.70X0.30cm/0.67X0.67X0.12in - Size: 1.70X0.70X0.30cm/0.67X0.28X0.12in Note: Rear (12mm x 142mm to12mm x148mm) -Enhanced compatibility: designed to fit various bike models, this bicycle hub adapter ensures seamless integration with your disc brake system -Precise alignment: the rotor alignment spacer keeps accurate positioning of your disc brake rotor, improving braking performance and reducing wear on your bike axle spacer -Durable construction: made from hardwearing materials, this disc brake mounting adapter offers long term durability, ensuring reliable performance for your mountain bike shaft adapter -Boost conversion ready: easily convert nonboost wheels to boost hubs with this boost hub adapter, providing enhanced stability and compatibility for modern bike setups -Easy installation: the hub spacer kit simplifies the installation process, allowing you to quickly set up your bike disc brake mount adapter without the need for special toolsPackage list: 6 x screws 1 x gasket 2 x gaskets washers