Features 1、Made of aluminum alloy material, Low density, corrosion resistance, electrical conductivity, good thermal conductivity. 2、It's compact and simple to use, no need to remove your chain. 3、Our machine it for a precise fit and to make sure it is very light. 4、Add a little colour to your bike with an aluminium zenith lockring. 5、It comes in a choice of four colours so you’ll be able to find something to match your bike. Specification Description: Add a little colour to your bike with an aluminium zenith lockring. It comes in a choice of four colours so you will be able to find something to match your bike. Our machine it for a precise fit and to make sure it is very light. Of course it also holds on the cassette, no matter how powerful a rider you may be. Features: Brand new and high quality. Made of aluminum alloy material, Low density, corrosion resistance, electrical conductivity, good thermal conductivity. It's compact and simple to use, no need to remove your chain. Our machine it for a precise fit and to make sure it is very light. Add a little colour to your bike with an aluminium zenith lockring. It comes in a choice of four colours so you will be able to find something to match your bike. Specification: Condiiton: 100% Brand New Color: Red / Golden / Blue / Black (Optional) Function: Fixed cassette flywheel Package Included: 1 x Bicycle Flywheel Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Package List