Center lock adapter is made of aluminium alloy and complete CNC process, with exquisite appearance, hard material and high strength. For attaching brake discs to the front wheel hub. Simple shape and dirt-repellent paint not only protect your bike, but also play a decrotive role. The centre lock adapter, which is compatible with 9 mm, 12 mm, 15 mm hub axles, meets your requirements as much as possible. Using this conversion kit, your centerlock disc bike wheels can be fitted with 44mm 6 bolt disc rotor. Very easy to install and remove. Requires external bottom bracket tool for installation. Come with 1pc disc brake rotor adapter, 1pc rotor lock ring. Colour Black Material ‎Aluminium alloy Size As picture shows Type Center Lock Adapt.