Onyx Racing BMX Cassette Hubset w/ 16T cog - 36H - Blue Anodized - USA Made 31.6mm and the rear hub is

and the rear hub is a flip-flop which will work with 13t and larger freewheels (not included)

Adjustable tension settings for smooth and confident clipping in and out

Posted Weight: 13

There is an additional charge of $10 per wheel for 48-spoke builds

It requires a 19mm bottom bracket (not included)

Onyx Racing BMX Cassette Hubset w/ 16T cog - 36H - Blue Anodized - USA Made 31.6mm and the rear hub isBMX racing is all about perfectly timing every pedal stroke and coast around corners, through hills, and during jumps. Your hubs are the gateway to the ground. Onyx BMX Hubs eliminate any thoughts about compensating for backlash and slack in the powertrain. Crank away for instant acceleration. Its impossible to sense any hesitation to drive your wheels with every push on your pedals. Then you notice the absence of clicking the moment you coast.